Still waiting for response to my claim 14 months later !

We were a party of 4 travelling in France and could not make our flight back due to a accident in a tunnel blocking access to the airport. After many calls we managed finally to get hold of a client contact center and managed to change 1 flight to a later one but all seats booked for the remaining 3. we were told verbally to speak to the help desk when we arrived at the airport and they would make a plan on next available flight. To our dismay we were shown as a no show and had to book with another airline to get home. There was no option of another flight , they didn't care . The staff were unhelpful bordering on rude. I have lodged a claim with British airways and after numerous e-mails and conversations , a year later told i must contact Comair! I have now re -submitted 3 times to comair , spoken to their staff and to date they have not had the courtesy to get back to me. everything is great until something goes wrong. they take the fare but do not provide any back up service. BA comair is a faceless company and don't care . I will seek legal advice.