Unable to access 'My details' in O2 account after porting number

[CBees]

I registered an account with O2 (email address/password etc.) recently.  The account is associated with the number which came with a new SIM card.  I then ported my old number to replace the one which came with the SIM card.

So far so good... But now, when I log in to my account and click 'Manage my details' it pops up a message saying "Security Check.  To access your details page, enter the code we've just sent to xxxxxxxxxx" where xxxxxxxxx is the original  (prior to the port) number.  How do I change the account so that it uses the number that is now associated with the SIM card?  I have added the ported number to the account, but it makes no difference when I try to manage my details, it still sends the security code to the original number.

I have used the online Chat service to try and resolve this and have been told that the only way is to set up a completely new account using a different email address!  This is clearly absurd.

[MI5 · Accepted solution]

Call customer services on 202 rather than using chat to get them to change your number.
I had the same issue recently with one of mine.

[Marjo]

Hi @CBees, welcome to our forum! Did you have a look at the advice above and manage to call customer service about your My O2 account? Please do let us know how you're getting on.