There are always trolls who are trying to take a casino down. do not spend time into them. i see his posts are already deleted, so soon you will get rid of him.
Maybe it is also an idea to show the betting limits, so people know how much they can wager on your site.
Your are right and about the limits, currently, a single bet limit is 10k and multi bet limit is 100k.
About displaying the limits, we do have this in our FAQ and of course, the system will alert the user when their bet exceeds the limit.
Kindly share with us if you have some other idea as to where and how to display the limits.