Money back refund

I booked a return flight from East London to Johannesburg. I’m not a person that usually flies anywhere and the reason for my flight was for a babyshower that is now cancelled due to the COVID-19 epidemic. I was given an option by Flysafair to either change flight dates, take whatever dates they’ve changed my flights to or cancel the flight and receive a voucher (only valid for 6months). I am really NOT HAPPY about the service and any of the options as I am not going to be flying anywhere in the future. I am really disappointed at how Flysafair is handling the matter as I don’t have any uses for the voucher and I would like to get a money back refund.