Obviously, the betting agent has some closeness with the gambler because I do not think that he will do like this to every other gambler at this shop. Depending on where you live, you should speak to a lawyer and see if the matter would hold any weight in the court of law. If it won't, then the betting shop owner must count this as one of the losses encountered in this business. Additionally, the next employee to work for him should be micromanaged to ensure that this incident doesn't repeat itself.