unauthorised debits

I have been an fnb customer for over a period of 15/18 years and I recently started going through my bank statements. Last month I found out that there was a company debiting my account monthly an amount of R99.99 which from Fnb one would not get an incontact notification of the amount as you only get incontact notifications for amounts exceeding R100.1 ...Last month I queried the one company and I got refunded.. to my surprise this month I got new guys whom are doing the same.. This however baffles me as I thought my money was safe in your account.Who gives authorisation for such without my concern..I wonder how many more of your customers are faced with such and never bother to follow up on it..This is a clear indication of\Money Laundering"as after you query the transaction you get paid your money back. What the hell... if this is not sorted very soon I will be moving my money to a safer bank..NXA!!!"""