TELKOM BAD SERVICE AND ******** DEBIT ORDERS

I TOOK OUT A CONTRACT FOR ROOTER IN OCTOBER 2018, THE DEVICE COULD NOT WORK BECAUSE I DON'T HAVE COVERAGE IN MY AREA. MY COMPLAINT WAS INVESTIGATED AND I WAS TOLD TO RETURN THE ROOTER TO WOODLANDS TELKOM SHOP. TELKOM IS STILL DEBITING MY ACCOUNT EVERY MONTH EVEN THOUGH I WAS TOLD THAT THE CONTRACT HAS BEEN CANCELLED. I HAVE SPOKEN TO SO MANY PEOPLE AT TELKOM, SEND EMAILS BUT I AM NOT GETTING ANY HELP. I AM SO MISERABLE RIGHT NOW AND DON'T WHO TO TURN TO.