Exorbitant fees to dispute a *****ulent transaction

So I went to Capitec in Stoneridge Mall to enquire a double debit on different dates by Uber and was told there was an error which not just me but a number of capitec clients experienced regarding Uber capitec is working on resolving and we will be refunded the double debit, 2 weeks passed no refund so I went ti Capitec to enquire again this time I meet a different consultant who made a call and some lady on phone told me I will be charged over R150 to reverse the R105 double debit which is disappointing to hear, why must I pay for an error which I was informed it was on capitec side even Uber insist I must refer to bank