No service
my phone has been saying no service last night, I have checked with my carrier (giffgaff/O2). All of the account is ok, I tried everything, resetting network settings, checking for a network update and none of it work, I tried taking the sim in and out, rebooting my phone and still says no service, I tried my sim in another phone and it does not work, tried various compatible sims and this still does not work. Can anyone suggest what else I can do, I can't even get Apple to call me because of course I have no service and I see they don't have live chat anymore
thanks
iPhone 6 Plus, iOS 9.2