London Underground Wifi

[Underground]

All of a sudden my mobile will not connect to the london undergound wifi.

If I go through virgin media and press the o2 icon, when i enter my number it just keeps coming up with "sorry, we've encountered an error and you have not been signed in"

I have tried reregistering at an o2 wifi hotspot but this has not helped.

Any advice greatly appreciated.

[MI5 · Accepted solution]

@Underground 

You need to contact O2.
All numbers are in this guide Guide: Coronavirus Community Help and Support 
When you call, you will be asked for the reason you are calling.
Stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
You can also try saying "Upgrade" or "Fraud" to be connected to an advisor.
8.00am is the best time to call if you can.