unfair Treatment..

I have been a loyal customer for MTN for years and I have never used any other Network other than MTN. That being said I then decided to have one of the contract for an HP Laptop back in 2014 in May with MTN , the contract was for 2 years, the monthly installment was R250. I managed to pay my installments monthly , MTN would deduct from my account every month on my pay day, however 8 months before my contract would end i lost my job and i didn't pay for 2 months , on the 3rd month i received a call from the MTN LAWERS , they were advising me with the legal actions that will take place if i don't pay the MTN acc. Luckily when they called i have just started with my new job and i provided them with my new banking details to deduct the money and i actually requested them to deduct double the amount so that i can settle the debt quickly. Well the following month the debit order went through and i settled the contract with MTN in less than 6 months (2016)

In 2016 late in the year i tried to open an account somewhere and i did not qualify due to my credit score , Then i went to my bank to find out, and the report was shown to me that MTN had listed me. I honestly did not understand why because i was only behind with 2 months and i had settled the debt with them. I was advised to go to any MTN store to esquire about the issue. I personally went to the Northgate MTN store , they couldn't find my account in their system I was then referred to MTN in Sandton then i was told they are a franchise so they wouldn't know what transpired and they also could not find my account on the system using my ID number so there was one guy that was willing to go an extra-mile to help me in this issue , he took my id number and said he will send an email to the MTN Head office to check my acc since he cant access it, he advised me to comeback the next day for feed back, which i did and he was not there i was told he doesn't work there anymore and they cant assist me since they know nothing about my case. Its now 2018, I am still listed for something that i paid off before i was listed. I am not happy with the customer service at all, I don't owe MTN nothing, i cant buy anything on credit because of MTN, My time has been wasted because of MTN.

Can someone help and do something about this???