If you believe your wallet has been hacked and you can still access it, immediately transfer any assets out to another wallet that only you control. Do not send any crypto assets to the wallet that has been compromised.
If your CNFT account is hacked, you would never lose any of your assets or ADA. All of your assets or ADA are stored in your wallet and NOT in your CNFT account.
The CNFT marketplace is just a place for you to view, buy and list assets for sale. Your assets are only with us during the exchange part. We have security in place and use the best practices to protect your assets during these times.