********* and ******* tactics for promotions

I placed an order for the special for two Big John specials at Chicken Licken @ R47 each making the total R94. When I placed the order the total was still R94 and R94 was deducted from my account. As the order was processing I received an error message that something went wrong on the app. After that it refreshed and went to the order status menu saying the order has been placed successfully. As i get to the shop to fetch the order I then got bank notifications for a refund for the R94 and a deduction for R188. This means that I was charged R188 for a transaction that should have been R94. I need a refund for R94. Uber keeps saying it's an authorization hold and I should take it up with the bank when they have clearly charged me the incorrect amount like the ******* that they are.