Standard Bank Mobile robbing unsuspecting clients!

My cheque card came up for renewal around the time Standard Bank was closing a number of branches in my area. I received a call to state my new cheque card had arrived and I needed to fetch it quickly before the Watercrest Mall branch closed in Waterfall KZN. I rushed to the branch to collect my card and the consultant at enquires was rushing me through the process which at the time I didn't think anything of, as the branch was closing. Now I realize why they slipped a so-called "Free Sim card" in with my new cheque card. I had no idea that in 24 hours they would debit my cheque account every month without my consent for something I neither wanted nor could use. After attempting multiple times to cancel it I have been told now that it has apparently been cancelled, but feel that for months they have continued to rob me. This isn't fair I have lost money each month for a service I never asked for or wanted.