If you search the forum you will see many threads regarding that scam.
Call them and ask for a refund and to remove your number immediately.
They will send you a refund that you need to cash in at your local post office.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion.
This is not Customer Service so we are unable to help with account specific issues.Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)