Collections Department

My account shows that it hasn't been paid for four months on my Nedbank App and it's affecting my credit record tgough I have been payingbit, I have tried contacting the Collections department to have tgis resolved with no success, I reached out to Vodacom on Twitter and was told to wait the matter has be referred to the Collections department and they will contact me but they have not. Each passing month my credit score keeps declining because of this and I have recently been declined an application because my credit score had an account in arrears an account which I am paying. Vodacom is ruining my life