I donít know why my fianceís visa was declined. Need advice.

Iím engaged to my fiance whoís currently in the Philippines. We are both planning to get married here in the States but her visa got declined somehow. Iím thinking of asking for help from a foreign marriage agency to help things go smoothly since Iím literally clueless with these types of processes. Any good recommendations for an agency? One thatís reliable and experienced. Affordability is a plus but really a need for us judging from how much time we have left until our planned wedding date. Thanks so much.