Sunscape Punta Cana is the former Occidental Allegro in Cabeza de Torro area.
You should be able to get a tour from your agency rep, or directly at the hotel from other reps (if your agency doesn't have one) at the reps' table.
You can also buy tours from independent agencies,
e.g.
Incentive in Dominican Republic - Tour Operator - DMC - El Caballo Tours - Corporate Travel
Colonial Tour and Travel: Incoming Tour Operator Dominican Republic
Domitur - Bienvenido