Terrible service from telkom

Telkom has been charging us for a 4meg and 10meg line. We have been calling since may last year and still no help. Do the people and telkom know what they are doing?We get transferred from department to department. The billing department has no clue. The service is terrible. I don't know how to sort this out. It really throws me of budget. I don't know why I'm charged for 2 lines. This is *******. Its pointless calling because they say everything is sorted and then at the end of the month I'm charged for 2 lines. Who does the billing there and do they know what they are doing. Very disgusted with telkom service. I would really like some help with this