failure to install phoneline in workmanlike manner

I have requested Telkom to install a business phoneline at my law firm after re-location to Centurion in October 2015. I received an SMS confirming the order. Initially the technician went to my residence to install the phone line. When I informed Telkom the order was cancelled. Since Oct 2015 I received 69 SMS's to confirm that a technician will come to the business premises to install the line but to no avail.A technician came to my office during the week of 8 Feb 16.The vehicle was parked at my office and they drove off in another vehicle only to return later that afternoon to collect the vehicle.I now received a bill for the phone line which is not installed.I never received any communication regarding any problem with the installation.I phoned the customer service to attend to the problem and received a reference number, but nothing has been done to complete the installation. This is totally unacceptable and we will pursue legal action in this regard.