That's awful!
Well from what you say, it appears that VM just do not want your custom and are just mucking you about in the hope that you will give up and go away.
Unless you have masochistic tendencies

or some ulterior motive to force VM to install, matter of principle perhaps, then your best bet is to get Sky.
It's a far superior TV experience anyway IMO and I have tried them both.
Good Luck with whatever course of action you decide on.