Misleading clients for rewards

Rewards - we were drawn to rewards at Sasol Garage for the ABSA 5% reward for Debit Card fill up. The poster was then amended to read 15% on credit card per fill up and my husband then decided to fill up the fortuner with Diesel and the reward made up for the unregulated price. We were studying the rewards which started off well but saw a decline in reward as certain facets were introduced. we became concerned and raised the issue with ABSA on several occasion on phone and visits. The last straw was our visit to ABSA Capegate which resulted in a hour and half wait and after that visit the home loan was never changed to as was promised from 1 January to June 2019. Still not done...FRUSTRATED, ANNOYED, ANGRY ETC