I have a bunch of stuff hand written in Spanish - I really can’t read it.
I never thought about calling the cops, you have a great point there! The “No habla ingles” phenomenon appreared at breakneck speed.
I just wanted up to get the hell out and get back here for treatment.
Although obviously consult a lawyer*, I’m thinking perhaps sending a letter via registered mail to the owner of the resort with a copy of that doctor’s letter detailing exactly what happened. At the very least, your entire travel expenses to Baja, your hotel costs, meals, car rental (if applicable) and airline flights, should be paid for. This assault thoroughly ruined your vacation and has caused you enormous pain and distress.
*You may need to contact a Mexican lawyer depending upon how you proceed, especially if you have to sue them locally.
Your story puts me off of the idea of ever getting a massage.