Bad customer service

I was having problems with my signal on my lte router which i recently took out from telkom.A week after I reported the problem a sub-contractor working for Atio came over and did a few test.I was told that I would be given feedback in 3 working days.It has been more than 3 working days now and nobody has even had the decency to actually phone me back or advise me on what to do.I am sick and tired of phoning through to Telkom as they are of no help to me at all,the service is just pathetic.Due to their poor service i even had lost a job opportunity(which i invested thousands on my laptop and lte router) due to my internet not meeting the necessary requirements.When i call through and explain my situation,nobody has any idea what I am talking about.