Seeking California Attorney for Cease & Desist Letter (Liability/Deterrent Focus)

I am looking for a California-licensed attorney to draft a formal Cease and Desist letter to a local business on my behalf. The Situation: My spouse is attempting to enroll my minor son in a local martial arts studio against my explicit refusal of consent. The Objective: I do not need to litigate this. My goal is simply to give the business pause. I want a firm letter sent on official law firm letterhead notifying the studio that they do not have the consent of both legal guardians. The letter needs to clearly highlight the potential liability, legal headache, and assumption of risk they take on if they choose to proceed with enrolling the child and allowing him to participate in physical activities without my authorization. What I am looking for right now: An attorney who understands this is a strategic deterrent meant to make the business voluntarily decline the enrollment. Agreement on a flat rate to draft and send the letter on your official letterhead if I need to pull the trigger. Requirements: Active legal license in California. Ability to draft a strong, authoritative letter focused on business liability and risk. Fast turnaround (within 24 hours) once given the green light. Please provide your flat-rate quote for drafting and sending this letter.