I don't know what exactly the support sent you, but I'm 100% sure that they are competent and that you maybe could re-phrase it somehow to help them understand your needs better.
I am attaching a trigger file here, and a snapshot of the game situation in which the trigger will back. Hope it does what you want, otherwise please attach a screenshot of the game where you would bet.
P.S.
I'm assuming you want to bet in round 3. If not, please change the round yourself.