Bad service and shocking service delivery

We previously had a WiFi contract out with Telkom that was up for renewal. However, we decided to cancel that contract and move over to fiber. This is where the start of the issues began. We visited the branch in Cape Gate center and was helped by a Brandom Dipple at the end of Feb. He assisted us in upgrading our contract to fiber (through Vumatel) and canceling the current contract. After a huge fight to get the fiber up and running, and hours spent on the phone with the Telkom customer service, we were finally activated by our fiber. However, we soon became aware of the fact that the previous contract had not been canceled, and that Vumatel were also billing us, meaning we were paying double what we had thought. We went back to the Telkom branch, and spoke to Nosipho on the 4th of March, who was very helpful and once again had to cancel the current contract (as that was not done in our previous visit) and that it would not be necessary to fill in any forms. She made sure to have Telkom customer service call us a little while after we saw her to confirm the cancellation and for us to agree on paying for both the old contract and the new fiber one for the month of March. It is now April, and we are still receiving invoices from Vumatel, which according to what we have been told should have been sent to Telkom, and we are being billed ONCE AGAIN for the current contract. So for a third time, we went to the Cape Gate branch, where we were once again assisted by Brendan, who denied ever assisting us and who denies ever completing the contract with us (yet they are billing us for the fiber contract that is currently active). When we asked for a copy of our contract, he informed us that there was no contract and denies ever claiming that the old contract would cease or stop. In a shop full of customers, he verbally berated us and told us we were ***** and that it was his word against ours. His attitude was utterly disgusting and the way he treated us was not fitting of someone in the customer service profession. He informed us that they were not going to be able to do anything and that it was once again up to us to spend hours contacting the Telkom billing center. This service is utterly disgusting. To say we are unsatisfied with this level of service would be an understatement. It would be of great assistance is anyone would be able to fix this problem in regards to our billing and cancellation of the other contract.