Vodacom Useless!

In January / February I took out a "20Mbs Uncapped" internet contract with Vodacom. When I took the contract out I asked the sales lady whether they "throttle" the line or not. To throttle the line means to reduce the line speed. Her answer was NO! I also told her, while being recorded, that if I find out that they do throttle the line I will return their router and sim card and cancel the contract. After numerous calls to Vodacom because of poor service, one of their technicians phoned me. I was informed by him that Vodacom says it's a 20Mbs line but it is not guaranteed and that they do in fact throttle the line. He will contact cancellations department to go ahead with cancelling the deal. Cancellations contacted me a day after. I asked them that I want the conversation that was recorded by them as I am entitled to it. Been a week and I am still waiting. Current internet speed is between 1Mbs and 2 Mbs! PATHETIC!