Ebucks incorrectly calculated

Good day

I have received my EBUCKS allocation for this month and noticed that I dropped one level - when looking at why I have gone down one level I can see that I am not getting an allocation for all my points on shopping online. I made a payment on 30/08/2019 to UNISA (online purchase) and my statement shows that it left my account on that same day however the merchant only banked it on 02/09/2019. When querying with ebucks I was told that this should be queried with FNB. I find this unfair that I have to run around to get this sorted out, I clearly made the payment on 30/08/2019 and should therefore be allocated the points, it is not my fault that the merchant did not bank on time my proof shows that the transaction took place on 30/08/2019. Please rectify and credit my account with the difference.