Unfortunately, if you are in a country wherein it is block regardless of what casino it is, then it's going to be very hard for you to play.
Usually, we don't recommend using VPN to bypass this as there are worse consequences like your account getting ban and then you can't withdraw your money if you still have some on that casino.
There are two levels of restrictions.
One is from a casino and if your country is blocked by a casino, you simply can not use their platform, in all games.
Another one is from game providers and if a casino does not block you, you can use their platform but whether you will have access to a game, it depends on that game provider. Some game providers will block you if your country is in their restricted country lists, and in this case if you use VPN to access these games, you will have problems with the game provider first, then the casino that has to comply with ToS of their partners (game providers in these cases).