How to cancel contract if never activated sim?

[Asset_89]

I was required to take out a £6 monthly SIM only contract with O2 when I renewed my Virgin home broadband package last year. The SIM has never been activated. The 12 month contract has ended and I’d like to end it - but so far as I can see the process requires me to receive codes via text message to the phone number/SIM. 

What should I do? Activate the SIM using my Vodafone handset?! Can this be done by somebody at an O2 store instead?

Thank you for any advice.

[MI5 · Accepted solution]

@Asset_89 

Your sim is already active. It matters not if you've used it.

Guide and contact details:

Guide: Cancelling Your Contract 

Guide: How to find help & contact O2 

[Asset_89]

Many thanks M15. My question is really how am I meant to receive/see codes for cancelling when the SIM and phone number are not in use? Is there no other route to cancelling a contract that doesn’t need the number to be active?  

[MI5]

@Asset_89 

Yes, just contact O2 customer service.

Details in the guide above. The sim can be put into any unlocked phone to receive codes if required.