Betkurus is right about this situation. The user violated their TOS. It's users own fault deposit BTC without reading TOS.
Betkurus should pay back deposited BTC. Even the user violated TOS, they can't hold his funds.
End of story.
Did you check this OP's first line?
What does it say?
"We invite everyone in world".
When someone win a lot money they say;
"Sorry dude, we wrote that in TOS very small, you can't play with us because you're from X".
That's why those shitters are SOB and scammer garbage. They have to pay the customers winning.