You should go to Tiendesitas, most [if not all] of the pet stores in the pet village offer grooming services. A lot of veterinary clinics do also so you could inquire with your existing vet.
Other than Tiendesitas, all the establishments I know that offer grooming services are Vet clinics. Usually the rates start at 400.00 up. I see from your avatar that your baby's a chow chow and I'm guessing grooming would be in the range of 600.00-800.00