Irresponsible Staff

I had a fully paid up account to my knowledge . My balance was 0. I did not receive any statements from edgars after it was fully paid up. I then went to purchase in July 2017 and to my astonishment they said that I owe R424.00 on my account. I queried for what it was and the said it was for insurances which I did not sign for on my contract. I paid the R424.00 immediately and spoke to the supervisor. She then advised that edgars needs to reimburse me and it needs to be cancelled immediately. She then made a call to the call center and spoke to a consultant and after she was done I spoke to the same consultant and they said that I would be reimbursed. All edgars calls are recorded. I purchased for R965.00 and I paid the R424.00 that was outstanding which needed to be reimbursed. Four months have gone by and nothing has being done they did not cancel that insurances in July 2017 neither did they reimburse me now at this moment they say that I am owing them R1300.00 and would like to know if I purchased for R965.00 how can I be owing R1300.00 and also in September I made a payment of R250.00. I've contacted edgars many a times and I am always asked the same old questions and nothing is being done about it. I even sent them the proofs of what they required in order for them to sort the account out. Till date nothing has being done and I received a sms today saying that I would be handed over if I don't pay immediatedly. Its no fault of mine. Please assist