No refund - ********* call centre staff - promises amount to nothing!!!!! Boycott Qatar Airways.

I have had such a terrible experience with the Qatar Airways Call Centre staff for the past 18 months to try to get a refund for a flight from Melbourne to Cape Town which was for my Deaf daughter, but then the borders closed and she could not use the ticket. I have emailed then 5 times, called 6 times (each time being promised that the refund will be made), I have lodged complaints on their website, but nothing helps. The cherry on top was when a person from the Refunds department called me to say that as I bought the ticket at the CT office, I needed to go back there for them to do the paperwork and then to submit the request for the refund - only to discover that the office has closed down!!!! What do I need to do to get my money back - R36 000.