acoount doesnt get cancelled

My contract with Cell C expired more than a year ago, however I only cancelled the account in April this year. I was still debited by June 2017 and I phoned in again to cancel the account. I still get debited every single month. I phoned in today to find out why it hasn't been cancelled and they tell me its handed over to the legal department. How do you ***** money from me every month and still hand me over to your legal department? Can I mention that I haven't used the number in over a year . it is real pathetic service, ill never recommend any one to get a contract from cell c.