California CLRA Contract Consultation

I have a strong, well-documented consumer protection case against a CPA firm in San Antonio, Texas. The firm charged my credit card without a signed engagement letter based on a verbal promise to eliminate million in capital gains tax — a strategy they later admitted they couldn't deliver. All evidence is organized and ready to share. I'm seeking a California attorney for a demand letter, and regulatory complaints with the Texas State Board of Public Accountancy and IRS Office of Professional Responsibility (the partner is a federally licensed Enrolled Agent