Totally bad service and no customer loyalty!!!

So Telkom thinks that they won't respond to my review below... well that's all good for me. if Telkom ain't doing nothing towards this nonsense they selling to people like me. I will do something by going to my bank and reverse last month's debit order and stop my debit orders from them. I don't care if they blacklist me...

Telkom is getting ******s for salespeople to make get sales and charge you unexpectedly high amounts of money that I didn't agree on over the phone. I took out a Telkom big deal in March the 30gig for R199 per month. I used it for two months and then Telkom sales people phone me to upgrade for an 80gig deal for on ±R368 per month, the sales rep told me I would not pay for a new device and no extra subscription fee. They told me my new amount I only going to be the R368. When I received my invoice for May it was an astonished R1200.32. I phone the call centre now, and the lady told me Telkom charged me for the device and my old contract plus my new subscription fee. I just need to know how do I cancel my contract with Telkom and its ******s for salespersons. I'm deeply disappointed. Social media will get this post.