Settlement paid - unable to close my account

I have spoken to Rishana on the 29 Sept 2015 and was given a settlement, which I paid on the same day. I did advise Rishana it will be an EFT which will show in a few days, and she said it will be fine they will see it has been paid. I will give proof of payment made on the 29 Sept 2015. I kept on calling back to close my account which still to day has not been closed and now they are saying I need to pay more. I sent emails to [Email Removed] and still did not get a response. I have phoned again and my account is still open and they refuse to close my account. This account has been paid in full and it needs to be closed.