Virgin Media - No phone line

I signed up to a new broadband tv & phone deal with Virgin. They installed the broadband but told me I would have to wait until they could install a phone line as there was no lines available I they gave me a little compensation for the loss of the phone line for a couple of months. Anyway after 3 months they finally connected me a phone line(which was part of the contract) and then a few days latter they sent me a letter saying my new bill would be £40 (it was £30) a month as there had been a "change to the contract". Strange (we are talking virgin here) I asked to leave and cancel the contract but they stated I would have to pay a penalty fee of £120 pound as I was cancelling early(umm bullying tactics by Virgin with very dubious legal grounds) but they did agree to lower the bill back to the original contract £30
Now a week latter the phone line has stopped working again and they are unable to give me a date for when it will be fixed.

1. Can I legally cancel the contract with no exit fee as I feel they are breaking the Consumer Rights act 2015 as they have clearly broken their contract by not supplying me with a telephone line. They did try and tell me that as the tv and broadband was working that they are still meeting their contract but I had to point out to them it was one contract for all 3, I signed not 3 for each separate services(yet again virgin seem to find any way to worm there way out of their legal duties)

2 - Am I entitled to compensation from them if they refuse to waive the exit fee and insist on charging me an exit fee if I have to take it further