3 months no resolution

This is my 3rd complaint on Hellopeter to no avail. My dad signed up for a smarthome essential package at the Telkom branch in umhlanga for R429 x 24. Instead we have been billed R529 every month since the upgrade. If you cannot resolve something this simple please assist us with cancelling the contract. We will return the modem and router which are still sealed as we are using our old router which is the same model as the new one. You would think with an upgrade you would at least get the latest model of device. Why is such a simple query taking 3 months? after every complaint I get an email stating that it will be checked on but nothing comes of it. Our account is showing in arrears and with the conflicting answers from your consultants, some saying don't pay until it's resolved, others saying the billing is correct, I don't want to be listed as a bad payer due to your incompetence. Renewing this contract was truly the worst thing we have done and we will not repeat this mistake. Please resolve immediately or advise on the Ombudsman for your sector, maybe he can advise you on how to run your business.