My phone was working fine for months and months but since the removal of the 3G network, I have no signal at all at my place of work.  This leaves me uncontactable for my young children (and anyone else!) for 9 hours a day, which is obviously not feasible.  Live chat have told me a couple of different things about unplanned maintenance but todays chat has found this to be untrue.  There is no resolution available and I am being asked to pay over £700 to leave my contract.  Where do I stand here as I am actually unable to access the service I am paying for.  This has now been the case for 15 days straight.