Woolworths poor service and false advertising!

We are quite at our wit's end. From 2022 we have been receiving promotional sms's from woolworths black credit card department. Each time, it is stated that a certain amount should be spent, between R1000 to R1500 in store using the black credit card and within a few weeks you will receive a cash back voucher. However on 3 occasions that we have participated in these promotions, the vouchers do not come through. When we phone the credit card department, almost daily for 15 days to enquire about these cash back vouchers, not one of the consultants are aware of these promotions? When we enquire in store they ask us to call the help center. We are usually on hold for about 15-18 minutes and then the call cuts. Then we call back and start explaining the entire problem again...only to be put on hold because they have to 'enquire from their manager' and at the 15 minute mark, the call cuts. Woolworths has gotten out of paying out this voucher last December simply because we got tired of calling Repetitively. This is ***** and false adverti*****t. to date this voucher is outstanding