mtn what do I need to say more

I have an arrears account with mtn as my sim card was ****** and someone phoned up a storm. So I informed mtn that I will be paying the account over a period of time as I do not have that amount of money available. Subsequently I was handed over to legal for collection. I settled the account on the 9 of February 2016. To my surprise the money does not reflect on my February statement. I phoned mtn to find out what the problem was. I was informed that they cannot help me as the account was with legal and I should phone a number in Johannesburg. I phoned the number and a lady picked up the phone but I could hardly hear what she was saying as there was this annoying background music playing that she could not turndown or switch off. Now I also have asked mtn on numerous occasions for a settling amount so I can close-out the account as I no longer require it. I am still waiting. All I need is for someone at mtn to do their work so that I can find out where the money is that I deposited into their account and what I still need to pay to get them out of my life.