Shocking service from Vodacom.

At the beginning of October I accepted an automated payment arrangement on my account. Due to needing to do a sim swop on my daughters ****** phone I then had to pay the arrears amount sooner which I did. However, Vodacom never updated the payment on the system resulting in my account incorrectly showing as being in arrears. Vodacom now refuses to assist me with any other requests even though 3 separate Vodacom agents have confirmed that my account is up to date and that the error is on their side. I was told that a supervisor would call me back to resolve my query and nothing happened... this was a week ago. I have been with Vodacom since day one and sadly it seems I'm being forced to consider a new service provider.