CONTRACT PHONE COMPLAIN

Good day

I have a very bad experience and still today no can help me, I dont know ehat to do any more I took a top up contract phone of R189 P/M on the 29/12/2017 at the edgars store in Pretoria Brooklyn mall. i was helped by a lady called Priscilla On the 16/01/2018 i discoverer that the contract phone i took was blocked, then i called customer care to find out what the problem was. i was then advised to go back to the store where i took my contract. When i got there on the 19th of January, Priscilla told me that there was ***** done on my account in KZN and she will sort it out and call me back. later that afternoon i called her and she told me she never had a chance to call because she had to go to a funeral and that she will call me back on the Monday. I then called customer care again because i did not understand the ***** story she was telling me. The consultant at customer care told me that was was owing them +- R8000 that is why my phone was blocked and that i should go back to the store to sort it out.I went back to the store on the 22nd of January and i explained to Priscilla the whole story which i sat at the store for about 3 hours and she was busy on the phone the entire time with his team leader Justice. after that 3 hours she told me that they are going to sort out the problem and called me back. Justice called me later that afternoon to get my side of the story because Priscilla is not telling him the whole story which i explained to him. There was a deduction on my account of R789 on my account on the 27/01/2018. I reversed the transaction on my account because i did not know why that amount is been taken from my account when i took a contract of R189 p/m. i went to the store on the 29 January which again i stood there for an hour and Priscilla is still not helping me with anything when i spoke to the team leader Justice he tells me that Priscilla says she never told me about any *****. I went to the Brooklyn mall Cell c store and there i am i told that Priscilla never did a top up contract for me and that it is a open line contract. I earn about R5000 a month with 2 kids and hens i am a single parent, so how am i supposed to pay that kind of amount. And on top of that Priscilla is still lying to me about what she did, can someone tell me what is the way forward. i did not know that that taking a phone at edgars i was applying to be corned. I sent out this complain to customer care on the 29 of January and only today a lady calls me back just to tell me that she cant help me and i should call customer care again. What should i do now?