Disappointing service from Go Connect Technical Team

Their service was excellent when they were coming in to get me connected to my fibre line, But since then, the technical service has been terrible. This has been affecting my working from home and the lack of feedback from the technical team has been disappointing. Just today alone, I have made 5 calls, and havent recieved any feedback from the technicians, though everytime I call the lady promises me she will get them to call