AirlineComplaints.org - Canceled / Delayed / Overbooked a frequent Traveler's Terrible Experience with Delta

I emailed Delta (similar as attached in this post below) more than a week ago to complain the experience and treatment I got from Delta during our holiday vacation.
And, I haven't received anything form Delta yet. Is it Delta's way to do business? Any suggestions about dealing the issues are more than welcome.

JJ
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Dear Delta Representative,
We are writing to report a very unpleasant experience with Delta Airline during our South America vacation in the holiday season.
We booked an open-jaw trip from Baltimore to Quito, Ecuador on Dec. 11 and return from Lima, Peru to Baltimore on Jan. 5. Here is what happened:
1. On Dec. 11, our flight DL379 from Baltimore to Atlanta (scheduled taking off at 2:36pm) was significantly delayed. The explanation we got at BWI was that some mechanical problems prevented the plane from leaving Atlanta. We were therefore put on flight DL1889 leaving BWI at 4:05pm, and arrived in Atlanta around 6:30pm. This of course resulted in the miss of our connection flight from Atlanta to Quito leaving at 5:40pm.
2. When we went to the Delta desk seeking help to get to Quito as soon as possible in order to make our paid cruise trip in Galapagos Islands, the clerk there was very rude (should have written down her name, but unfortunately didn’t). Except telling us that we were put on the same flight the next day, she refused to do any research for us even with us mentioning that Delta partners with Copa Airline who has flights to Ecuador. Even worse, she first insisted that the delay was due to “weather”(so we were responsible for everything including the lodging in Atlanta -, yay, she did offer a discount rate at Econo Lodge for $59.95 per night). Then she offered that the air control was the reason, which again was nonsense as the later flight came in first. We asked for speaking to manager, then was told that he would only be available in an hour…
3. The clerk did eventually give us vouchers for one-day lodge and meals in Atlanta. (And the SkyTeam T-shirts did trigger “Welcome to the SkyTeam” cheers among our fellow cruisers later.) And we finally settled in the airport hotel around 8:30 pm. The direct result is that we missed our first day and night of our 10-day Galapagos cruise package.
4. Too anxious to relax at the hotel, we went back to the Atlanta airport at 2 pm on Dec. 12 to confirm our seat to Quito, and to double check that our two check-in luggage were ok. At 4 pm, we finally had our seats and were assured again that our luggage were on the flight…
5. Fun was not end yet. Imagine what a shock we sustained after we passed passport control in Quito around 1 am, Dec. 13, and COULD NOT locate our luggage. Delta luggage personnel in Quito seemed having no idea, but asked us to fill out the form of lost luggage and said that the best scenario was to have our luggage fly in next day, only if they could locate them. After communicating with them that our cruise ship would be in San Cristobal on Dec. 14. The lady told us that Delta would use the earliest flight to San Cristobal by TAME airline to send our luggage to the ship, again only if they arrived next day. (It was after 2:30 am when all the paper work was done and already too late for us to go to the downtown hotel we reserved as a result of the 1-day delay of our arrival in Quito, as we needed to be back to the airport by 6 am.)
6. In the morning of Dec. 14, Celebrity Xpedition found no luggage for us in San Cristobal and then figured out that our luggage were still in Quito and Delta was not doing anything about it unless I sent them a letter to release the luggage to Celebrity Xpedition (couldn’t Delta personnel make a phone call first – we gave them all the numbers?)… Eventually Celebrity Xpedition arranged the luggage being delivered to us on Dec. 16 and charged us $100 for it (We can fax in the receipt, and we believe that Delta should be responsible for this if nothing else!!!).
Can you imagine how embarrassed we were without changing clothes for the half of our Galapagos cruise (we traveled from freezing Baltimore to Tropics)? When in the middle of nowhere, the only thing we can do was to buy everything possible from the Gift Shop: T-shirts, shorts (no, we are never T-shirts/shorts person), wind jacket, rain poncho, sun lotion, insect repellent, toothpaste (yes, we did fortunately save the toothbrushes Delat gave us in Atlanta just in case), you name it. Of course, the price was not as friendly as that in Wal-Mart. And, every night we needed to hand wash underwear and socks, and used hairdryer to dry them. Enjoy such vacation, anyone?
As a government employee working for NASA, unlike many of my colleagues who are loyal customs to United or American Airline, I keep flying Northwest for a long time (Elite member for years). Since the merger of Delta and Northwest, I would like to fly more on Delta (made 2 trips in 2009 and possibly more in 2010). However, this trip was a disaster, the worst trip I have ever had. My wife asked me never to fly Delta again, saying Delta may be the largest airline in the world, but also made the biggest troubles ever to us (more stories told by fellow cruisers of course).
Thank you for your attention, and hopefully we can get a good response from Delta soon.

JJ