Please help me fix my problem with Telkom

Telkom Cost me my whole life ???

My Name is Sabelo Kenneth Sibiya I had a contract with Telkom Mobile it started in 2014 if I’m not mistaken everything went well until in 2016 November when one of the consultants call me to tell me my contract is almost expired I have an option to renew it an take a new phone and I agreed but I ask the guy if I can upgrade from 100 minuets to unlimited calls, Data and sms and he said yes but he will phone me again to confirm, and he call me again but he told me be I can’t get that new phone I need to pay my outstandings. And I settled the outstanding and the gave me the contract because the payment reflected on their account department few days I receive the phone and the guy phone me to ask is I’ve the phone so he can activate it and he said to me I must not use my old SIM card until the next day and I didn’t what he said and he phoned again to tell me it’s activated everything fine I can start my unlimited contract and I will pay R1800 per month. On the 27th December 2016 R4500 was debited on my account by Telkom and I phone the account department to ask why are they debiting so much and she said to me there’s amount outstanding and again ask this lady you can see this is a new contract how can I have an outstanding and if it was for the previous contract i could ve never got a new contract and I told her the next day I’m going to bank to reverse that money and telkom must Debit the correct amount and I did reverse the money and what did they never debit they waited for end of January and for my Suprise again the debited R7000 and something rands and Absa bank said I must fix the problem will the telkom because the can’t keep on reversing money on my account so telkom start blocking my phone and my number not receiving anything the the block me everywhere send me to debts collector and blacklisted me and now I can’t do anything the cost me a lot in me life

Please help me to solve this problem