please transfer your BTC into a hardware wallet because Web wallet on do not trust much more at present time
If you want to save your coin than buy hardware wallet from the Online portal and transfer all your Cryptocoins in Hardware wallet it was much safer
Unfortunately, on this case he can no longer access his wallet on that site because it can't be reached anymore.
This is a lesson learned for him and I hope that the amount that was lost isn't that much and is acceptable.