I have an outline of what may have happened. But usually Airlines do demand that carry-ons be relieved and gate checked. In extreme circumstances – i.e. too much cabin bags allowed into overhead bins (not passengers fault of course!) carry-on bags are taken away and usually there is no time to consider the valuables inside. Whenever they get mishandled (as they often are), ‘limited liability’ regulations will apply without due regard for preceding circumstances. It is good you have indicated you intend to contest, but I would advise more objectivity over emotions, as they have a formidable legal arsenal in the fort!
carrynoIncident