SAMSUNG , BLUE TIER REWARDS BIG ******

I bought a Samsung Fridge at Makro, it came with a Blue Tier reward of R4000 which I was supposed to used for flights. The voucher was expiring this November. I had called British Airways wanting to redeem the voucher. They were not flying and the call centre was closed. When I call Blue Tier, I am told that my voucher has expired. Samsung are very big ******, don't buy their products promising you big vouchers. You will never get it. Now Blue tier is making as if I am the one who made covid. They day they didn't close when the President announced national lockdown, and that I was supposed to call. I called British airways, there was a voicemail saying they have entered into a business rescue, what was I supposed to do? worse I have sent an email to blue tier on 17 November, they didn't respond by email but with a call. Now I am being punished. I called today because I am following up on an email that I never got response for? How can I send an email and you respond with a call? I don't have proof that you called me.