Tarnishing my name

Had a mobile contract, which I cancelled last year July. Only to find that it was not cancelled and they kept charging me. I dont understand how when cancellation request was received and if they keep charging, why was I not getting the services? This is utterly disgusting as it now is in the way of me getting a job. Was called by recruiter to be informed about this. How embarrassing!! All to be “told that this cannot be resolved now” by Telkom!