Inaccessible benefit

[Segilla]

In have just had a call to say that as a good customer i am to receive some sort of reward which can be activated on receipt of an email. I explained that I now had a new email address, but the O2 msg is being sent to the old one (BT) which will simply notify me of its receipt, but it cannot be answered from there.

How do I contact O2?

(Never change yr email address! Endless problems trying to establish the new one on the sites you use).

[MI5]

@Segilla 

See guide Guide: How to find help & contact O2 

[Bambino]

@Segilla It's most likely a scam. Probably a good thing you can't respond to it.
Block the number and report it free to 7726.
Don’t open any links or enter any information.
O2 advice here:

https://www.o2.co.uk/help/safety-and-security/phishing-and-smishing-advice
https://www.o2.co.uk/help/safety-and-security/unwanted-calls-and-messages
https://www.actionfraud.police.uk/

How to block a number:

https://www.samsung.com/us/support/answer/ANS00062352/

https://support.apple.com/en-us/HT201229