Hi Martin,
Everyone here feels basically the same way as you do about the company and the lack of communication and meaningful information (I guess if everything was working exactly as intended we wouldn't be here on the forums).
I'm only with VM as I have no other viable ISP (I can use BT, but only on a copper line which maxes out at 10mbps, for a modern household that is almost unusable these days, if I could get fibre from BT, even if it was fibre to cabinet (maxing out at around 70 - 80mbps that would be fine, for most people that speed is adequate) but I'm on an direct exchange line which means it's not possible).
The bad communication and support you are getting (and your not even using their service yet) will Not improve, therefore if at all possible, remove the hassle from your life and go with another ISP, it's not worth the stress (in my opinion).