Relocation of voice service or "Move a Line"

At the end of March 2018, I app**** online and via the customer service for my voice line service to be relocated to my new house by the 23rd April 2018 - this is all within Pietermaritzburg. On the 24rd April, a private contractor of Telkom arrived and I was told they must first provide new poles. This took about 2 weeks, but then they said there is a problem with the "underground" line??? Customer services just say the job is with the Underground Services Unit and cannot give me any progress or feedback. I was able to get hold of the number of the acting manager at this unit, I guy called Jay, but he never answer his phone or return my calls. What will be my next action? Does anybody have a number or email address where I can formally lay a complaint?