I’m trying to link my account for gems of war from my other phone to my new one
What issue are you running into? You need to have registered the account to an email, at which point on your old phone you should be able to get a password from the settings/account screen that you can then put in on your new phone to link it.
This is what the screen looks like on PC
and on Mobile
So on your old phone you need to use the Register this Device button, and then Show your Password (take a screenshot of it or write it down). Then on your new phone you go to Link to Another Account and input the password you got from the old phone.
I’ve did all that I’ll try again when I wake tomorrow
If you’re still having trouble after that, send a ticket to support and they should be able to help you out with any issues you might be having.