Bad Customer Service

There was a ***** that was made on my account around June and I only found out around late July when I wanted to find out my balance. Someone made a purchase of R9400 of two cellphones and even tookinsurance for those two cellphones. I have been dealing with the same issue since July and it hasn't been resolved to my satisfaction till to date. I have used my account since June and I want to close but I can't because I refuse to pay the money supposedly that I owe. I have logged a dispute with the consultant in Cresta and it wasn't submitted twice. I am appalled by how I'm being treated by Edgars. I have been their customer for more than 10years. Irefuse to pay the outstanding amount until the matter has been resolved. Can this matter be resolved as I need to close the account immediately and its also affecting my credit reputation as a South African