Unauthorised Debit orders by Fnb

I am an Fnb client belonging to a so called 'Premier Banking' . My account is being debited an amount of R99.00 on a monthly basis by a company called ANA using another company called Stratcol as the facilitator. Fnb informed me that to cancel the debit order is R 50 and to reverse will be free of charge. my main issue is every time I stop the Unauthorised debit order another debit with the same amount but different company starts and then I have to again pay R50 to cancel and I am told there is nothing that they can do. The amount is just less enough not to report on my SMS notification as only more than R100 will notify and it's only when I went through my account that I noticed. <br> The numbers of this company where I am supposedly their client keep on ringing. how can I be called Premier Client but don't get the Premier service?