Ridiculous account for cancelled data services

The contract I took was R300 per month with all the free minutes, Telkom to Telkom and free whats-app and 500mb data. My accounts have been sky high every month. Then more then a month ago I called Telkom and was informed it was the "out of bundle data" that's causing it. I asked them to stop that immediately, if the data is finished, its finished, I will purchase a bundle when needed. First they said the system is offline to change it and that I should call again. 2 Days after that, a Telkom sales person called to sell me something and I told them I don't want anything else and that they must stop the out of data immediately. She insured me that she cancelled it. This month again I had an account of almost R900. So it wasn't changed. The account should not of been more than R300. I WANT MY MONEY BACK!

ALSO, when I purchased the contract they offered me a "high quality" powerbank for R150 and a "high quality" blue tooth speaker for also R150. I took it. The powerbank worked for 1 day. The speaker is so small, and the sound not good. Another R300 down the drain.