On Friday I received three phone calls from the number 0800 111 6121, claiming to be O2 and telling me that my bill is overdue by £10. I tried ringing the number back and it started asking me for my debit card number, at which point I hung up straight away. I've never received a call from this number before and I don't know if it genuinely is O2, so I'm not giving out my details until I know for sure. Some websites are saying its a scam while some say it really is O2.
Does anyone know?
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