First step is reboot your phone ,you may need to do this a couple of
times. Are you friends on O2 also? I’m asking as O2 have been slower
that other operators to sign up for 4G roaming cross agreements with
other providers.
I've found that using Firefox's remember my password facility doesn't
seem to work properly on the O2 site, perhaps they've found a way of
foiling FF password storing option
This may be due to the phone picking up a signal fom Turkey or North
East Cyprus (the Turkish part) meaing you are receiving a mobile signal
from outside the EU and are paying a higher non-EU rate. Switch off
roaming just in case