cellc bad customer service when it comes to cancelling off expired accounts.i want cellc to stop

i have two contracts with cellc one was for a tablet phone which expired this year june and another is for an LG phone which is expiring this coming december 2015.<br> <br> my problem is that i took up these contracts with cellc via their retailers but now that im cancelling the contract i am being told to call their customer care number for cancellation of which i have done in june for the expired contract. then july came my bank account got debited i went to cell c meadowlands to enqure about this & to find out why am i still being debited & why cant they cancell the contract for me since i didnt purchase my tablet or phones on line i was told thats how cellc opperates.<br> <br> i then called cellc again to cancell these on going debits for an expired contract and even requested them to send me an email that states that my contract has been cancelled to this day i havent received that email & my account keeps on being debited monthly & every month i must go to the bank for reversals which is messing with my credit record i need to purchase a car at this moment i dont qualify because of cellc returned debit orders please help because i dont want to go through this again for my last contract.