I have two phone numbers but can only access the account for one

[SSH]

I have two telephone number for two separate contracts both in my name but I cannot log in to both. I can log in to one which is linked to my child's phone but not the one linked to my own account. 

[MI5]

@SSH 

Can you log in online https://mymobile.o2.co.uk/ ?
If so, try deleting the app, rebooting your phone and then reinstall the app.

We’re just customers like you but it sounds like you’ll need someone to access your account which can’t be done from here. If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this
Thanks

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