That is awful.
There are 11 Bahia Principe resorts in the Dominican Republic. Find the one you went to in the list below at Trip Advisor, and write a review:
Search results: Bahia Principe dominican - TripAdvisor
Lots of people use Trip Advisor, so hopefully you can warn others so that they can avoid the place and put a dent in their business. I would also look for other places on the internet where you can place a review, and write a letter or file a complaint with the Dom Rep's tourist officials. With the economy the way it is, resorts and tourist economies are hurting, so hopefully they will take this seriously. If not, write more reviews where everyone can see how officials in that country treats their guests.