Contract Ending and the Auto-Save program ???

[WoodyJames]

Hello,

My O2 contract ends on 19/4/22 but I just got this from O2:-

"Hello. Your minimum contract term ends on **Personal info**22. As part of our Auto-Save programme, your monthly plan will automatically go down from £40.56 to £29.99*.
You can choose to stay on the same tariff, move to another one, or switch to another provider.
For more information and some tariffs to consider: http://v.o2.co.uk/F1I1b8s5
*+RPI adjustment applies. Terms apply."

So I guess my question is "What is this Auto-Save program and why have I been placed on it without my knowledge or acceptance?!"

[MI5 · Accepted solution]

@WoodyJames 

It's an OFCOM regulation that protects customers from paying further for a device that is already paid for.