Going to another casino is the best choice, because nothing is perfect, even the leading casinos that already have thousands or even millions of users will definitely have users who experience problems, no matter who is wrong but it will definitely happen, and going to find another casino is indeed the most common step taken by gamblers when experiencing problems, but there will also be many who come and the casino will not feel a loss because it loses some of its users and hopefully you find a better casino but not necessarily from how many users rate the casino as good which may have the same problems.
We can't force people to stay if they don't like what they've been through despite that it's their own fault with the findings that have been found against them. But even if the time that he chooses or anyone another one, 1win is always open to them if ever they have decided to come back. This place is open to everybody unless they're the ones that have been stopped and banned by the system/staff.