O2

I recently changed the email address I use for accessing My O2. At first everything worked fine and I could view and download my bills, but now I cannot view any billing details, just My O2 WiFi and my personal details. O2 Customer Services have been...

Hi,Can anyone tell me how to get O2 to add Conference Call feature to my line? It would be very useful for working at home. I have tried online help, visiting the high street store and phoning O2 Customer Services, where I couldn't get through to a r...