Wrong Billing, No service

We ordered a fixed line from Telkom in March. Have had to beg to get it up and running. <br> <br> Now it finally is, and the first bill reflects a package we did not order. <br> <br> No one is willing to rectify this, either on the phone or in person at the branch. This despite showing them that we signed for something else on the contract!<br> <br> The bill is due, and they aren't willing to correct the amount owing so we can pay it.<br> <br> We are frustrated, and there is no solution until now.