If you mean wallet address by wallet ID then go to "Find your wallet address", enter new address, link new address, enter your Coinpot email id, verify your new address by signing a message, and this address will be linked to your Coinpot account.
The "find your wallet address" is on what site? I don't see that at the coinpot website. Yes you sign up with the email address, but a wallet ID is associate, or wallet address as apparently some here are calling it. I need to change that association. Your directions are clear except for letting me know which site I'm on to begin with. Either I'm blind and not seeing it, or I don't see the "find my wallet address" at coinpot itself.