Robbing Me!!!!!!

I was at the Coca Cola dome and there was Rage (Gaming Expo). I decided to get telkom wifi with one of the ladies working at the Rage. I got approved the same day and went to collect it. I got home and saw that I do not have coverage at my house and decided to return it within the grace period. I had it for 4 days and then the lady came to fetch it at my work. I gave her the cancelation form with the wifi device. I was sure that it was handled. I then app**** for a Samsung Galaxy S8. I was approved and had to pay R629 before I could get the phone. I got it and was extremely happy. So comes the end of the month then they deduct more than R1500 out of my account. Turns out that the lady never cancelled it and i had to pay for something that I havent even used or dont even have! I called them and they sent me the cancelation form again and i scanned it and sent it back while on the phone with telkom. Then they sent me an email to give me the case number. So I decided to leave it because it will be such a hassle to get the money back. I do not use my telkom simcard for my phone because i do not have coverage. And I dont even mind. I have an awesome phone so do not care! Then comes today!!! They deducted more than R1100 again. I called them yet again. The said that they tried to contact me on the 22nd of December. Obviously I know it is a untrue story because I am a manager and always answer my phone. I am soooo angry!! I hate this network and place! They just want to ***** our money. I am going to reverse both transactions! I am so sick of this!! I will not recommend anyone to use this!