Unresolved complaint about billing

I laid a complaint on Hello Peter about the fact that Telkom was going to bill me incorrectly. I was contacted by Telkom and I was told that it was going to be resolved however this was not the case because on the 25th of October Telkom proceeded to still bill me incorrectly and I would like a refund on the money that I was over charged. This is an absolutely poor example of good customer service from Telkom.