Not receiving all cash backs due!

Hi As a customer of Discovery for many years, I have completely embraced their whole eco-system with many of their products. I have accepted my fate having done many of the required triple backward half-twist summersaults through 58 different hoops and as such, I am Diamond status on all three platforms. I have gone through all this effort to reap the benefits of the discounts offered and make purchase choices with this in mind. Considering all the effort it takes, to achieve and maintain diamond status across all 3 of your platforms I should not have still have to audit my cash backs for Fuel, Healthy Food, Healthy Gear and Healthy Care. However, it seems without constantly checking, I would miss benefits because your systems are seemingly not capable of correctly calculating my correct refund amounts! For some reason someone at Discovery Bank decided it would make sense to use the same transaction description for Healthy Food, Healthy Gear and Healthy Care, namely “VitRetail”. And with no online system showing what each amount is and how it was calculated I can only guess that you once again messed it up! And seemingly to improve service levels you have decided not to offer any support via email!?! How does this make sense for an electronic, branchless bank?!? For this month, I received R73.57 in Vita Fuel. My discount percentage for last month on fuel was 15% and I spent R1,068 at BP and Shell. R73.57 makes no sense at all. I also received R124.54 in Vitretail, which I can only guess is Healthy Food. Considering my discount percentage for healthy food was 50% last month, this seems low but short of keeping all my Pick n Pay slips and re-performing the calculation, I cannot disprove this refund amount. However, considering your track-record of inaccuracies and omissions, I think it should be you that proves that this refund amount is accurate! I also spent R1,979 on Healthy Gear. I see no refund for this purchase. As mentioned, I make purchase decisions based on the refund that I will gain. It is tantamount to ***** if I am being “incentivised” to make certain buying decisions only to not get the refund later. Please, can you this be rectified.