Cheated by Uber Eats

I've been a loyal customer for 2 years. I placed my last order on 8 July and paid R180 cash on delivery ( total due was R174. 78). Now when I go to the app to place a new order, it says that I haven't paid R74. 78!? How can the driver ***** the money and accuse me of not paying the full amount. He did check the money before handing over the food and he did get a tip too. This is very unprofessional and their customer service is very poor, all they ask for are Screenshots and they never resolve matters.