They always warn users to use the correct address for any type of transaction and you are responsible if you make a transaction at the wrong address.  Only if you send your funds to Coinbase to an unregistered Gmail address, they can return it after a certain period (they did it before, I got my funds back, they sent me back the right amount).  But for any type of wallet address created for the right assets from Coinbase, they don’t have access to funding recovery.  If there is any possibility of accessing that address by a private key, it should be reserved only to higher authorities.  Otherwise, there will always be a risk of being compromised.
So if your problem is still not solved, I would recommend that you try to contact the authorities in any way and they can solve it for you.