Upgrade that wasnt taken out by me .

I have a contract at telkom for a tablet of R169 per month ,I have been paying my contract until they had an issue with debiting ,I contacted my bank and it was no issue with them .telkom didnt deduct for 4 months but ive still been paying with easy pay number at pickn pay . I then decided to phone them to find out if I can pay up the device fee as I was tired of having money in the bank and then they never deduct then every payment they add a R200 fee . The lady said okay she will send the account number for me to pay up the device fee . Which has been a month ago and still waiting for the account number to be sent. I therefore phoned again and they said the contract was cancelled. Which I didnt want but they cancelled it . I then arranged to do payments monthly still . On tuesday they deducted 1700 from my bank account ,in which now suddenly they have no problem in deducting .I then phoned to find out why as I made arrangement to pay monthly .they then said I was in arrears of 1700 as I took a upgrade in december ,an upgrade I was never aware of ,never received any device or data nothing ,never signed for it ,never been called to take to upgrade ,nothing . I then told them I want to speak to a team leader as no one can assist me ,they said a team leader would contact me ,no one called and I called again ,a consultant then managed to email a team leader ,the next day a team leader called and said she can see there was an upgrade but she will have to phone sales department to find out when it was taken . Up to today I didnt hear of her .and I am to a point where I am done with telkom. The upgrade was obviously ********** as I have not been aware of it and now no one can phone and assist me to solve the problem ,today I got a message saying I will be taken to attorneys for that contract fee of 1700 that im in arrears of for that upgrade that im not aware of . Really upset and will never use telkom ever again.