My o2 app is not working

[Shoaib]

When I open the app and the messages appeared

Something went wrong.

Oops. My 02 isn't available to you yet.

If you're new to 02, it can take up to 48 hours for your account to be ready.

If it's been longer than 48 hours, get in touch and we'll look into it for you.

[gmarkj]

This is not a new problem @Shoaib and the advice is the same: 

Recent changes have screwed everything up.

This is a customer to customer community, not O2, so we cannot access your account, sorry.
You need to contact O2.
Message them on Social Media. Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) or give them a call on 202 or 0344 809 0202 (contract) 4445 or 0344 8090222 (PAYG)

Other instances of this problem:

https://community.o2.co.uk/t5/My-O2/My-o2-app/m-p/1703506 

https://community.o2.co.uk/t5/My-O2/O2-app/m-p/1680868 

https://community.o2.co.uk/t5/Tech-Support/My-O2-app-is-not-working/m-p/1616827 

https://community.o2.co.uk/t5/Tech-Support/MY-O2-app-not-working-correctly/m-p/1698019