O2

I recently switched phone provider, O2 are sending me text messages regarding an outstanding bill, because I moved my telephone number when I switched I can not access my O2 to see what the bill is for.Please advise me how to see this bill or request...

How do I get my Hub 4 router replaced?Randomly only WIFI will be connected to the Internet, rebooting the router makes no difference but later in the night my wired network will start working again but appears to be off for longer and longer periods ...