Don’t use Mango airlines.

I made a booking for myself and my children to fly from Cape Town to Bloemfontein and back to Cape Town before lockdown. When the lockdown was announced I have emailed and phoned them to arrange for a refund. After my fb message and the 11 emails they have decided to send me 2 vouchers of amounts way less then what I have paid for our tickets. And There is still 1 voucher outstanding and a lot of money on the other 2. They have decided to send me vouchers after I explained to them that this is not a cancellation out of free will. This is because of the pandemic we are in. I would never have cancelled this flights as it was for a sport event which was also cancelled because of covid-19. And We don’t intend to fly as we don’t have any interest in any other province. I feel they have bul**** me into vouchers that I don’t need. And do I have to accept way less then I have paid for my tickets? This is not my mistake for cancellation. Why do they penalize me?