Standard Bank surprise fees

I called Standard Bank to report that a company called MBS247 / STRATHONVH had sent me an SMS stating they would deduct R126.69 from my account. I have no recollection of engaging with such a company nor giving consent for them to debit any of my accounts. Standard Bank then told me that their policy is to charge people R52 to stop a debit order whether its ********** or not. In my case because the SMS did not state which account they would debit, I was advised that I would have to pay the fee for all of my accounts, of which I have 2 and so I'd be looking at paying Standard Bank the same amount as what this other company was planning to ***** from me. I find it astonishing that a bank that I pay monthly monthly fees for the "privilege" of having a have a "Prestige" account would charge me even more money to stop a ********** debit.