Cell c retensions dep!

I called and spoke to retensions dep and was informed to make a payment at Nedbank and they would close my account. I did so when called this morning I was told it would only reflect the next day and they could not help me though if it goes through go march they will be charging me for march billing. However paid what was needed till now. When i asked to discuss with the manager as I am going over seas and need to close my bank account I was told that retensions manager Allan Govender was unable to take my call. Could someone from Cell C maybe help me please!