Samsung rewards vouchers a ****!

I bought a Samsung fridge last year with the promise of R6000 voucher rewards. Well it was such a mission to even get registered. They had so many issues and the stories were many as to why who else I needed to contact. It took me months to get it right! I eventually got my first voucher in August 2020. Now when I call to see what's the hold up with my voucher I get told its been cancelled! Excuse me??? The lady on the phone was so rude! No explanation other than its already done. This must be a ****! People need to know this! It's absolutely unacceptable for such a big name brand! Why offer something you not willing to do? Do you really need to **** people to buy your products? I expect this to be resolved by samsung! Either in vouchers or cash! But I want what was promised or I will be taking this further!