Swoop airlines did this to me with trying to fly from Toronto to Puerto Vallarta, Mexico. They cancelled my flight and would only give us a voucher. I called MasterCard Canada, which is the card I paid for the flights with and opened a dispute as they had cancelled the flight. I think it was called a failure to provide services. I provided the emails from the booking and the email that Swoop had sent me cancelling my flight. It took almost 2 months but I got all my money back. You might want to call the credit card company that you used to book the flight and see what your options are Jeepers.