Yes you can make a complaint though there may be no ethics violation. You should have considered a signed agreement at the mediation to prevent...

Who do I need to speak with?

Contact an experienced California lawsuits attorney.

Can I use a General Denial Form for a "Written Response" to a civil suet for $1300 by first party?

Yes, if the complaint was not verified. Do not forget to consider Affirmative Defenses and a cross-complaint.

Yes, that is the form you use for a dog bite case.

How can I legally get out of collections without paying?

If contesting with the credit reporting bureaus or the billing entity, considering sue who is claiming a bill is owed.

How can I legally get out of collections, when I don't believe I should be in there?

If you cannot find an attorney you might sue in small claims court

You may want to make complaints to the proper licensing authorities.

Los Angeles Small Claims Court Status: Unknown disposition - should i be worried?

No. Get the filed papers to the Court to find out the date and what it is about.

You need to look for a contingent (percentage basis fee) employment attorney.

What type of attorney should I be seeking? Civil? Personal injury?

A personal injury, privacy or civil rights lawyer.