Vumatel, do better!!!!!

I have had a fibre installation with Vumatel at the beginning of February 2021. I have not had any internet connection and despite countless calls they insist that that everything is fine on their end they refuse to have a technician come out despite my countless requests for one. The error message says that it cannot connect to the remote server. Both Vumatel and Home Connect are pointing fingers at each other - but I still don't have internet.