Billed and listed on transunion for non existant contract

I had a contract with MTN in 2014. The contract ended and somehow I kept receiving bills from MTN and they have been debiting my account.

I called the customer care line in beginning of 2016 and asked why I keep getting billed because my contract has expired and I have not requested any further services from MTN. I was assured that my matter will be dealt with. I sent an email on 12 February 2016 requesting that whatever services they are providing must be cancelled.

Fast forward a month later in 17 March 2016 STILL MTN was debiting my account. I called the customer care line which never really gets answered to query this issue. I tasked why I was getting billed when I specifically advised that they should cancel whatever services on offer.

It's 09 April 2018 and I AM STILL GETTING BILLED BY MTN. Now I have note on my credit report stating that my MTN account was handed over due to my non payment of R104..! What bull is this!!! I need all funds debited from my account returned...and this listing corrected..!