Contract ended and still being debited

Telkom... What a horrible experience and horrible services. I took a contract online got the phone and every was fine until my contract ended and i am still getting debited which i dont understand why.. At some point i blocked their debit order it added up and they clever of them tp change the debit date and i eventually paid the amount owed to them i no longer use their sim card as i dont want to be debited again by them... I recently got a bill of R200 its been 3 months already of me not using the sim card.. This company is a **** and i encourage people not to use it really.. Im thinking of taking this matter with legal people.. I can't be paying for services i dont use really..

I called this other day after hours of not being answered i asked for a cancelation form and a consultant dropped the phone on my ear.