No itemised billing after months

MTN is the poorest service provider ever. I took out a contract with MTN in August 2015 I did not receive my account so I phoned MTN customer service in September asking for Itemised billing, the person on the other end did not even know what itemised billing was. I then phoned again in September to request it and they told me I will receive it soon. After 3 weeks still nothing, so I went to a MTN shop and requested it at the shop where they informed me of the charge for itemised billing, I said it was fine as long as I receive it a.s.a.p. They told me I will receive it within 3-5 working days. 2 weeks later and I still did not receive it. At the end of October double my contract amount went of by debit order and I did not know for what, I do not use my cellphone that often because we do not have cellphone reception where I live. I then phoned again asking for my itemised billing to see what they are charging me for. Again they said I will receive it within 48 hours and guess what till today still nothing. I send 6 e-mails requesting it. I phoned over 10 times also requesting it. I have 13 reference numbers and still nothing. I don't know what to do just to get my itemised billing