I think you did everything right. After all, if the casino offered you to stop your bet in advance, then what percentage of the casino calculated that you have a good chance of winning and you are about to win even more money. There can be no other reason why the casino tries to stop the player's bet in advance. Unfortunately, you ended up with a chance to lose, which was small, but fortune decreed it so. It was not your day. No big deal, you will get lucky later.