Flysafair

I had a flight booked for myself and my daughter to fly to Durban in March to go on a holday cruise but flight was cancelled due to the lockdown. I requested a refund but was told that if I cancel( which I didnt) I will be charged a certain percentage which is ridiculous. I was then given a voucher which is valid for a year. I have no intention of travelling by air or going on a cruise in the near future so why cant I get my full refund back as this is a global pandamic and no fault of mine. Come on Flysafair have a heart and refund my full amount back. Or even better sell my ticket to somebody going on a business trip and give my full refund back please.