Paid up contract still showing as active

I had a contract with Vodacom 4 years ago. I finished paying for it in 2016 - 2017. When i was looking at my credit profile, i see the contract is still appearing as a financial obligation that i still have to meet on a monthly basis and this is affecting my credit score in a very bad manner. I called Vodacom and i have been sent from pillar to post. I was sent to 4 places and when i got to the 4th place, i was sent back again to the 1st place. Your call centre people are very rude and when i request to speak to the Manager or supervisor,they hang up on me. My acc number that i had was I ********** . Can you please remove me from your system as i no longer have a contract with you. Can you please make sure that this acc no longer shows on my credit profile / report? Please do that or else i will be forced to report you to the National Consumer Commission for unfair business practices and for incompetencies.