Someone should tell the jerk that there are heavy penalties for fraud and extortion.
An offer of help was asked for (by the way, did the couple ask or was the request from the church?)? , and people volunteered to help. If the jerk did not say at the beginning that he would help only if he was paid, then he has no reason to expect compensation. Also, as the whole idea was to help and save the couple money, it is perfectly clear from t he beginning than any help, while hugely appreciated, is voluntary.