[boo0hooo0]

I'm very disappointed with American Airline customer service on my recent travel to Montreal, Canada. I booked this trip for my 2 kids, my mother, and my sister going to Canada for my brother's wedding. With my mother and sister's US permanent resident status, I confirmed travel regulations with Canada Embassy, US Customs and Border, and last American Airline before booking. They all stated that an US Permanent Resident with the Green Card will able to travel to Canada with no problem. However at connection flight in Miami Florida, customer service at the boarding counter stopped my mother and sister and refuse to help. "I can't help you without a passport, next please". The fact that the flight was delayed, they rushed us out of the way and boarded others. I tried to ask them to check out the system but they already started packing their stuffs and leaving. Luckily my mother brought her Vietnam passport so they let her through. I couldn't leave my sister behind because she is new to America and doesn't speak any English. I called the 1-800 AA customer service to get help. The representative was nice and helpful but she could not do anything at this point beside booking us a another flight the next morning and document all the matter. She also pointed out that AA should already stopped us at Jacksonville, Florida if our travel did not meet regulations. Next morning we did get our flight out to Montreal, Canada with no further problem.
I'm very disappointed and upset with AA customer service in Miami boarding counter. They refused to look into the problem, and very much rude. I still remember the only thing they had to tell me that "Do you want to get on board or not?" and packing their stuffs to leave. Despite the fact that my sister and I missed our brother wedding ceremony on Saturday noon, we did not have anything with us to lay over the night, all our stuffs were checked-in at Jacksonville, FL. We had to spend money for taxi, a motel nearby, food for my 5 years old and 1 year old.

Can someone advice me what to do to complain AA? IS there some rights that I can exercise? Thank you.