Do we have a case against British Airways for tormenting us during our recent travel to Paris to get engaged?

On 05/23/13 my girlfriend and I were supposed to fly out from Newark. NJ on a direct flight to Paris, France. Our flight was cancelled 6 hrs prior to departure and we were never notified. BA claimed they did not have my phone #(I included my phone # when i booked using expedia). I was placed on a different airline to travel to Brussels, Belgium and from there we had to take a train to Paris. On the train we were declined entry because the tickets issued by British Airways were not accepted by the train's manager. When checking in for travel back to Newark from Paris BA's staff told us our reservations did not correspond with their tickets. We were sent off to another desk and denied to speak with a supervisor, The staff was untrained and incompetent and was unable to resolve the issue. BA's manager refused to provide me with his info claiming privacy law in France. He smirked entire time while my fiancee was crying. Now she needs therapy and cant sleep due to the BA's treatment.