Discovery Credit Card is cheating customers of their Healthy Food Cash Back

When I received my Credit Card statement at the end of July. I noticed that I had not received my Cash back from my Health Foods Shopping from Pick n Pay. This amount is usually a substantial about. I immediately logged a query and asked them to look into. We are almost 3 months down the line. I am still not receiving Cash back from my Healthy Food shopping, despite pages and pages of Inquiries, Emails and promises to look into it and reference numbers. 2 Days ago I received an email saying I would not be receiving cash back as I had not swiped my cards before putting through my shopping. This is untrue as I always have and always do swipe both my Discovery Credit card and Health Foods Card before I put through my shopping. I have requested my slips as this shows if the card was swiped and nothing. I feel cheated. We do our part to remain on Diamond status and Discovery cheat you on the benefits that you have worked to earn.

I have Reference numbers from the initial query logged on the 28 July 2020, and a paper trail.