Unashamed theft

Booked tickets on 1/8 for repatriation flight on 10/8. This was then moved by Qatar to 17/8. We were bumped off this flight as it seems only business class passengers were taken due to number restrictions. We then rebooked for 3/9 for another repatriation flight. We received an email inviting us to update to business class. After the previous experience we thought this would be a good idea to ensure we actually fly. Upon calling to change to business class, we were informed that this was indeed not a repatriation flight and would therefore probably not fly. We have recorded messages that state this was a confirmed repatriation flight. How can a company continue to take desperate people's money knowing full well they will not fly? Is this the level of integrity that Qatar stands by? We have spent endless hours on the phone still waiting to speak to a manager, no one wants to speak to us as we are a problem, we have recorded proof of Qatar blatantly lying.