Capitec not returning my money

Whenever I order an Uber, cancel it and get charged a cancellation fee Capitec doesnt return the money that was held as a pre authorisation. I ordered an uber for 106, i was charged 11 for cancellation but I never received the difference back into my account. When I contact uber they say they voided the authorisation and only charged the R11 yet no money has gone back into my account my balance has never changed to reflect the difference. Same now as well hey dont return the money immediately then later when you check there is no longer a record of the money that was deducted on that day just a record of the charge. I have kept my bank balance the same so I can see when the difference comes back but it hasnt. Why must we wait so long? When we email them they say there is no record of any deduction of that amount. Its so damn irritating that they can change the records of what is reflecting ono our accounts. If you can show the money going back into my account but then later change the records how am I supposed to know that the money was put back after the preauthorisation was voided?