Bad Service

I have a Telkom mobile contract for 3years.After getting my 3rd upgrade I noticed on my statement that there is an ADD ON INTERNET BUNDLE ,which I did not sign for or agree to.I called the call center on the 6th of December 2015 and was told that after 2years you have to pay for the data,so I told them that I want the data bundle for R139.The lady told me that's fine and gave me a log number and that the sales department will contact me within 72hours,of which never happened. I then called on the 18 December 2015 and was told that they are still working on the issue as they are receiving high call volume.Today I call again n the lady tells me that she is aware of my call logged but someone will call me shortly as the sales department is still working with it.This is not what I want to hear,because for a whole month nothing has been done,and i still had to pay that extra for the data bundle that i didnt want.I then asked to speak to a Supervisor and was put on hold for 20minutes,is that what you call customer service.I want this sorted out as I don't see why I should pay for something I didn't sign for or agree to.