STA Travel A ****

I booked a trip that was to take place in September with a Deposit of R2000 that is non refundable should I cancel. But due to Corona their airline canceled. I want my Money they say it's non refundable. How so cause no bookings on my name hense their airline canceled due to the Pandemic. They only want to offer me a voucher or I postpone. And I am not willing to accept any of this. My money is laying by their accounts yet no services could be rendered.