O2

I got a new uograde phone and never changed the SIM card I’ve been double charged for my bill this month and my networks been turned off meaning I can’t use my phone. So I can’t even ring o2 to sort this problem how do I go about getting my phone net...

I upgraded to the iPhone 12 on august 24th (12 days ago) and since then have seen that the newest iPhone 13 is being released,I have read and believe that I am able to return my phone within 30days,there for I could upgrade to the 13 when it is relea...