This is the best information I could find.
"You need to import your wallet private key into a new wallet that supports both networks. Depending on the wallet you are importing, you can also use a seed phrase instead of a private key. After importing the private key of the wallet into another wallet, you will have access to your funds.
Please note that due to the import of the private key, funds are not sent to another wallet. The user simply accesses their wallet from another application. This method is available only for users of non-custodial crypto wallets. PS. Coinbase is a Custodian Wallet.
Custodian wallet users do not own the private key. To solve this problem, you should contact the technical support of your wallet or the exchange to which you have poisoned the coins. Some custodial wallets can help for an additional fee and provide access to private keys. After receiving the private key, you can import it into another wallet that supports both blockchains. You need to import your wallet private key into a new wallet that supports both networks. Depending on the wallet you are importing, you can also use a seed phrase instead of a private key. After importing the private key of the wallet into another wallet, you will have access to your funds." e.g. Metamask
Basically we need to get Coinbase to provide the private keys to our ITOX addresses that they generated for us.
This is directly from Coinbase.
"The only way someone could access your funds would be if they had access to your Coinbase account, or in the case of a non-hosted wallet, your private key.
Note: It is not possible to delete crypto addresses from your Coinbase account. Deleting addresses from any wallet is highly discouraged since funds sent to an address which has had its private key deleted will be lost forever.
Public Key (Public address)
Similar to how an email can be given out to anyone to receive messages, your receiving crypto addresses can be given out to receive payments. You can view all of your receiving addresses here.
Private Key
Much like one needs the password to an email account to be able to access and send a message from that email address, wallets have what is called a private key that is needed to send funds from a digital currency wallet.
Coinbase is a hosted wallet service, which means we manage your private keys for you, securing your funds with a password, device confirmation and 2-factor authentication. We take security very seriously at Coinbase and utilize our secure cold-storage technology to protect our customer’s funds."
If they take security very seriously to protect our funds then they seriously need to give us the private keys to recover our lost funds! If anyone has any luck with this please share, thank you.