ABSA ADVANTAGE VOUCHERS NOT BEING HONOURED

I have a portfolio of banking and investment products with ABSA since they were formed in the 1990's. My experience continues to be negative with poor service and failure to honour their promises. I have this year twice been awarded R 50 meal vouchers on their ABSA Advantage App however they are not being honoured by the stores. The first one was with Burger King Fourways Mall and today Steers Broadacres. I attempted to use them before the stated expiry date as well as instore as stated on the voucher. The Steers Voucher I attempted to use today will only expire this Saturday 17 April.