Well, here's my two cents. I would load the cake in the car and take it to the venue. Approach someone in charge of the wedding, planner, mom, pop, sis, somebody and let them know the cake is here we need cash payment. That might put a fire under them to come up with the cash. That way just in case there is a misunderstanding and I don't think there is but for the benefit of the doubt. You might get your money and it would be over. If not keep on down the road to the nearest charity or your own church, drop off the cake, start your lawsuit come Monday morning. Don't forget the bride has a wishing well, bridal purse, mom has money in her bra and dad money in his sock. Go get it.