it is really necessary to give us more details. Bitsler has a pretty good reputation here, and online in general, so it is very difficult to conclude what happened here only after a few words from a completely anonymous person.
In general, I don't think that's how we should justify a casino. Just because they have good reputation, they are not liable to give reasons is not the way they should go. A casino can selectively scam any client. A client should have his/her rights to know their reason too.
Account was blocked due to management decision. That's what I see their explanation.
OP bitsler have an account on the forum, PM them and tell them to make a response on this topic explaining their reasons.