Terrible Workmanship (Line installation)

Telkom installed our ADSL line over 6 months ago. After the installation we inspected the work which was found to be absolutely appauling. We have since called and opened numerous cases which again and again get closed without so much as anyone even coming to sort out the bad workmanship. We have extra wire/cord lying over our roof and dangling over the side of the house. Telkoms workmanship is and customer service is an utter disgrace. What is it going to take to get our installation sorted??? Next step is posting the photos on social media...