Unauthorized debit orders

I am a very frustrated Capitec customer as 3 debits of R45 each went off from my account today. This is also not the first time as last month a R95 debit went off that I have no idea about. What's even more frustrated is that I am charged a service fee of +-R3.50 for each debit, and when I dispute the debit I get charged another fee. I am definitely considering changing banks as the bank is failing at keeping my hard earned money secured.