TT Connect - poor service

To say the service I have received is frustrating l, would be a huge understatement. TT connect called to tell me I need to upgrade, they came and it was done. I was called a few weeks after with the same story. Raced home on a Sunday to be home for them to come do this upgrade, only for the guy to tell us it's been done. He took a photo of the new box and went on his way. Yesterday we lost connection, I logged a call and eventually the same lady calls me telling me we need to upgrade and the only time they have is Saturday. I told her how it has been upgraded and she argued with me and wanted a picture, when the guy had already taken one! I told her I want a Manger to call me and by 2pm no one had called me. When I called TT connect at 2.15pm the receptionist told me no managers were there cos it was lunch. I left a message for a manager to call me, and of course no one called. So due to their incompetence and lack of communication, we sit with no wifi.