Billing to high

My cellphone bill for the month of Jan and Feb were too high and i contacted MTN requested for a itemised bill which i will be paying for and the normal turnaround time to do something like this takes 2- 24 hours as per the agents i spoke with. It has gone past the turnaround time and I get responses like the issue is in progress and it might be sent to me over the weekend if not on monday. I mean how long can a report take to process against my number for just two months? Its really pathetic that MTN can't even give me a proper answer as to when I will receive my itemised bill. I requested to speak to the teamleader, supervisor or manager and I was told that they cant assist me, only the support services department can assist me. I asked for an email address for the support department and was informed that they dont have a direct email address nor do they have telephones to speak to any clients. I think this service is appalling and I would like to place on record that I will be cancelling my contract after about 12 years with MTN.