on 23-08-2021 17:40
Why are you calling me? I can't understand the agent, just contact me via email
on 23-08-2021 19:14
O2 don't have a call centre in Leicester.
It's a scammer.
Block the number and ignore them.
Ways to report here including Action Fraud website
https://www.o2.co.uk/help/safety-and-security/phishing-and-smishing-advice