O2

Just got a new phone and transfers the sim over and when I go to use my data it just doesn’t work, and yes I do have data to use. Would appreciate some help

I'm new to pay monthly so I was just wondering if someone could help me with a question I have... It says I was billed on the 22 August, is this just to let me know how much i owe?It says payment due 5th September, I made a manual payment today (23rd...