Why has my tariff changed without my knowledge

[laceowl]

Why has my taraff changed without my knowledge or permission?

[Topic title edited for clarity]

[MI5]

@laceowl 

No one here could know.

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
Or advice from an O2 Guru regarding a way to get through:
If you call 202, when it comes to 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.
Say "Upgrade", "Lost/Stolen" or "Fraud" if you have to, to get put through to someone.

[Marjo]

Hi @laceowl , how are you doing today with your tariff? Did you manage to find out more from customer service about the changes?