Telkom bad Service

I asked for my line to be moved to a new address and was charged for installing a new line. So this month i have a double payment on my Adsl line. I received a new number as i was moving from one suburb to another. Phoning in is a nightmare. Nobody knows what is going on! They tell me i was charged for 2 lines but they cannot do anything about it?? I need this sorted out with urgency.