Urgently need help

I make contact with them early this year to find out how to repay them and how much to pay they gave me a deal once off I will get discount on the remaining ballance I ask them how much they said R4092.60 I took it last month and I ask the lady to go ahead since they hold me reliable for this account on a cellphone I bought I reported faulty so I stop payment because they promisse me that they will replace it with a new one but since today nothing they deduct the R4092.60 so my account is settle now they want alot of things but that was the deal for once off and they are the only things that hold me onto debt red flag on my name why since 2017 I'm under debt review (Debt fresh ) in Port Elizabeth up untill now I pay them but I can't be cleared why only God knows why