but I can't find any for Deribit. So as mentioned above, you need to reach out to the support team.
They have mentioned that on their ToS page
Using the Wallet on our Platform is at all times at your own risk. We are not liable for loss of Cryptocurrency stored in your Wallet or transferred to or from your Wallet, including, but not limited to, unauthorized access by a third party, loss or violation of your private key or transferring Bitcoin to an Ethereum address.
So I guess this can be considered as a complete loss, OP can try the support if the amount is considerably huge like in few hundred thousands or else there is no chance of recovering them back.
Transferring from custodial platform to custodial platform should be avoided by any crypto user cause we need to get a hold of one end to minimize these kinds of errors.