It'll be Seapro Divers then - Playa Dorada was where I stayed. They have a rep at pretty much every hotel and run a shuttle service from your hotel to the launch site and drop you back on the hotel's beach.
See my
Trip Report or the
Sea Pro website.
Remember your cert cards, hep jabs, anti-malerials and to haggle like fook with everyone. If you don't use Sea Pro make sure you see their cert cards
AND public liability insurance and there are loads of cowboys out there.
You will only get 2 dives a day with Sea Pro, others will do more but Playa Dorada is on the Atlantic coast and can get a little entertaining (Feb's suppose to be the best, calmes month)
Any more info needed let me know - ps take lots of Factor 50 with you as it's £15 for a 1000ml bottle there!