The California enactment of the Truth in Music Advertising Act (Bus. & Prof. Code § 17537.12), is a criminal law statute. It can only be enforced by a public prosecutor (i.e., Attorney General, District Attorney or City Attorney). It cannot be enforced by a private person.
If you want to enforce your rights under the TIMAA, then you must file a complaint with either your county district attorney or Office of the State Attorney General.
You can also, of course, sue for defamation of character (slander/libel), and you can further sue on a trademark or dillution complaint, assuming that your adversaries are actually marketing a product or service in violation of your trademark.
For a trademark infringement attorney referral, see this link
Hope this helps.
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