Billed for something I am not gettng...

I am a Telkom customer with 3 different lines, one of my lines that was installed in December was meant to be a 10mb/s adsl line, I have been charged for a 10mb/s line but the Telkom support team have confirmed that I have a 2mb/s line. The 2nd Line was installed on Monday and to do date has not been connected when I called Telkom about the line connection I was told that the line is registered in someone else's name and that I should call technical support to rectify the problem, I have spent many HOURS on hold but have not resolved either problem