casino says “irregular play” but i only did small blackjack bets then one big slot buy

so i’ve been grinding blackjack super low stakes, like mostly minimum bets, for a while just to clear my head after work. wasn’t chasing anything wild, just a few bucks here and there. then i hit this mood where i put the rest of my balance into a slot bonus buy, not really thinking i’d hit anything, but i actually did okay. now the casino’s saying my play was “irregular” and they’re stalling on the withdrawal.

i get the idea behind not wanting people to abuse promos, but i didn’t even use a bonus, just ran through my deposit. feels like they want to keep my money just cause the pattern wasn’t “normal” to them. has anyone else run into this sort of thing? did you actually get paid out or did they just keep dragging it?