Vox - ***** service and antics

Vox provides a service through TT connect fibre. They have been deliberately affecting my wifi signal to my home by turning signal off at key periods and only when I call them do they turn it on. Despite this, I still paid for additional extenders to be installed at my home. A guy called Jonathan claiming to be a manager calls me to verify that the issue is on the extenders. He claims he did a check and everything is good on their side. When I asked him for the report, he went dumb and looked confused as if I was asking for something foreign. He then put down the call on me. These people are not working to provide a service but to show they are working, he is calling me and wasting my time. I told him to be his extenders and show me that they work. Vox is a total *******, and no one is investigating these guys....so much for essential services. Too much ***** things going around that one can have no recourse.