Capitec wont tell me if they paid back my balance from the preauthoristaion.

I did a purchase on checkers 60/60 app and a preauthorisation was done but then the final invoice amount was less than the preautorisation. When I enquired about the balance Im being told it was put back into my account but they cant tell me when and there is no line item to show the preauthorisation and the final amount and the balance. So there is no record of this. I must sit and calculate all the amounts that went off my bank account to see if I really got the R150 back. Its really infuriating. Why cant the transactions be recorded as they happened so that there is visibility.