British Airways has ****** from me!

I booked a return flight to UK and when I was there and covid hit, they closed the borders and airline when I was suppose to return back home. So British airways automatically cancelled my ticket and offered me a refund or an evoucher. I opted for the evoucher (because I read NO ONE!!! was getting their money back so I didn't want to take that chance and sit with no voucher to use whilst waiting for this "refund"). I thought they would only be locked down for a short time frame which is WHAT THEY ANNOUNCED! After that time frame they announced had passed, I wanted to rebook my return back home and their airline was still closed and were going to be closed for a while and weren't sure when they would reopen! Forcing me to have to book with another airline to return home. After I returned I called for a refund. Every person I spoke to told me they DON'T DO REFUNDS! (Then why did they offer this to me as an option?) I have been trying for over a year now to get my money back for my return ticket and I keep hitting dead ends with this company. British airways HAS ****** FROM ME! and I want my money back!