You can replace your compromised account’s linked wallet with a new wallet. However, the replacement wallet cannot be linked to an existing account. If you signed in with your replacement wallet and accidentally created a new account, you will need to unlink the wallet from that account. Go here to do this: Manifold Studio - Wallet Settings
After you unlink your wallet, you can sign in to your original account (either via email or your compromised wallet) and unlink the compromised wallet, then link the replacement wallet at the same settings page as above.
Let us know if you need any further help or clarification.