Tired of cellc and their inexperienced staff and management

Please help me understand how I owe cell c and why my credit score is bad because my account is in arrears with cell c where I don't have a contact with anymore my number has been moved over to Telkom and I never got my refund of R900 something and then you bill me in November showing R1000 something and my R900 something credit and I owe R200 something and now I'm in arrears by R200 something ???????????? I dnt know if I'm dealing with our idiots or what , I can't call you coz my number does not go through oh and don't forgot I'm always told when I get through we can't locate your account it's with another merchant not cell c ???? can I get my ****en refund and this **** off my name I want nothing to do with cellc you are a bag of bull **** with employees that don't know how to do/ execute their jobs at all. I don't complain coz I wanna I complain when I know things are done to me and it's not right and you can't even prove anything besides say I will call you back till today still no call back wow a joke isn't it