R99 unauthorised debit orders on my account

I am banking with capitec and the has been debit debit orders going off my account which are unauthorised. when I contact Capitec they told me that its Stratcol LTD and Shachah Marketing. I have no idea who these people are and I have never taken a contract with them. when I call Shachah marketing with the number that the bank provided, that number is just ringing. why is the bank giving people access to my money??? I thought my money is safe at the bank. I'm not even sure who to address this with , the Bank or these **********