Utterly Unprofessional and Unorganized

I booked flights in December, and in the week we were supposed to fly, President Ramaphosa implemented stricter covid regulations. With this happening, I tried to cancel the flight. I got an email a few days later, stating that my tickets are not refundable and that I could book again within in the next 6 months. When I went to book about two weeks ago, they could not find my tickets on the system. I nearly lost it. After a whole back and forth, they see I had been refunded. Please note, I paid almost R3000 for my tickets, they claim to have refunded +-R300 without contacting me or informing me. This after I already agreed we'd rebook when the time is right. I am livid! I have no idea what to do next. I feel the miscommunication between SA and British Airways London is the problem, that I now have to deal with!!