Seeing the list of countries, I would prefer if they would have told us which few countries are allowed to gamble on "Otherworld" casino and it would have been easier instead of looking and searching for our country in the banned list


Actually, no need to search, when you try to open their casino and you are from a prohibited country, their system automatically gives information that they are not available in our region.
They want to comply with the regulations that bind them, so they should consider the target market they will get. Only if in the future the situation can interfere with the income and growth of the casino, they should have some studies on the list of countries they prohibit.
This was the exact information I got. So with this information, the allegations that a staff or rep advised someone to use VPN isn't valid. This is because in the image above, it was advised to disable VPN and try again. So, we should learn to follow the official information on the website.
However, I used a VPN just to be able to access the site again, but it seems the location I routed using vpn is also prohibited. So, with and without VPN I cannot access it again. Maybe I have to keep trying locations till I have a unrestricted location.