I was in Can Cun many yeasr ago but I went to the Cancun Marina Hotel There is a dive boat there and they were good guys and very professional... but that was 15+ years ago, who knows what happened since the last hurricanes and all that. Its right next to Carlos and Charlys’.
The best thing is to check with padi travel. they know whats going on there. Have fun and check out Senoir Frogs. Thats a fun place!