Linking my card to another phone

Hi I am trying to link my card to another phone number as I now have 2 phones.
It wont let me link.
This looks like a recurrign issue with other users and they have needed direct support.
However the support line is “very busy” - so not sure when they will get back to me.
Can anyone help please
Thanks

It’s not possible right now. You can install the app on two devices, but you need to always log in with the one phone number that is associated wit your account.