No customer care at all

I had a contract with mtn which i decided to close in Feb,i called the customer centre for the early termination fee and went to an mtn shop to pay,i called and wayls told they received the funds and that the number has been changed to prepaid.later on mtn kept debiting my acc,i called renltentions dept a number of times,spoke to Getrude and a lady called Gugu,eventually i was told they gave me a wrong fee and that they would put a credit note on it seeing as it was their fault.NOW Mtn has put a note on my credit report that the acc was handed over while they are athe ones that gave me wrong fees yet i paid up my acc and my number is no longer on contract,this is utterly disgusting as they can even go back to the recorded calps and listen what their employees where saying,ive just bought a house and this adverse listing can jeoperdise that but MTN clearly does not care,i want that nonsense removed from my report.