worst service provider

I requested a settlement amount from the retensions on the 19th of february spoke to nokuthula ref ********** 37 for R1401.25 , paid it in on the 21st and ever since that day it has been a nightmare to have my contract closed , i submitted a complain on twitter and im yet to hear fro MTN , on the 26th on February i called the retention's department again seein that no one is responding , spoke to Tori Ref ********** 22 she was efficient enough to explain that there was an error made on my account and that it was now sent to the accounts department to fix , unfortunately i still have not heard anything, called in again yesterday spoke to Sizwe REF ********** 91 he was able to see that its with the account department . I am fed up with always having to call in . Can i please have this sorted out and that this be treated with urgency because im not the one that made the error , the recordings of my calls are enough evidence because i called more than once to confirm this settlement amount .