Looking for a referral. Our home remodeling contractor botched the job and left it unfinished.

You can file a lawsuit in court for breach of contract and related claims.

If this is specified in your lease, then yes.

Trying to serve an attorney with a malpractice complaint but none of his listed addresses are valid.

You can hire a private investigator to find the attorney to serve.

Any law that protects or helps me to keep having my Sundays off?

No, there is no such law that states you are entitled to Sundays off.

I have 1st conference at DLSE this week for wage claim, if I will not agree for a settement and file a complaint that day and

No, the statute of limitations is three years. It is four years if you file a lawsuit. However, you can and likely should hire an attorney for...

You will likely need to amend the judgment to include the correct party.

I've filed wage claim at DLSE, What will happen if my claim won't be successful,

Your employer can sue you, but there really would not be much merit to that case.

What to do after answering(General Denial) to a complaint with an affirmative defense?

You can conduct discovery in this time period and get your evidence ready for trial.

Question about a Promissory Note

You can file a petition to compel arbitration to stop the suit from going forward.

How do I send the paperwork out certified (or where theres like a proof of delivery?) like the judge wants?

Just go to the post office and mail the document out via certified mail with tracking.