unrequested change to registered account

[ViJay24]

I have had my mobile number linked to the same email since 2011.   Not sure if this is relevant but I updated to SIM only in January. 

Since early March I have not been able to access my phone number/bill account via my previously registered email/login.

When I log in it doesn't show my mobile number - when I try to add my mobile number I am told it is already linked to an account? 

I have contacted o2 who say it is linked to another account?  How the heck has that happened?  They have also tried to put it back to my correct email - but it doesn't appear to be working?  What can I do? Randomly they say it is linked to an o2 email address which I have not access to? 

[MI5 · Accepted solution]

@ViJay24 

When O2 gave customers an email address they registered all accounts to a random email address.

You would have been given the option to change to your own email, but this was back in 2011 and O2 email has now shut down so no access to that, even if you could remember what it was.

I had the same issue but O2 have managed to change to a different email that I can access but it has to be different to the one you used previously.

Guide: How to find help & contact O2 

[Oxonian]

@ViJay24 

Just to follow on from @MI5's advice, I would suggest that you set up a brand new e-mail account with the likes of Gmail, Hotmail or Yahoo. 

You will then have an e-mail address to provide to O2 when you contact them ; you will be certain that it has not been linked to your O2 account previously. 👍  

[MI5]

I'm pretty sure that anyone capable of registering for the forum is capable of getting an email address 😏