Doubtful you will find one as most attorneys do not want to take on the banks. This is why there are so many pro se against the banks. I am not sure what the appeal was for and its relevance. It is odd that they are asking for you to pay the debt or they will start the foreclosure if you were allegedly already in foreclosure. I'm not familiar with California law and am not an attorney either. I'm not sure about the new trustee but that might indicate that Mr. Cooper has/had no standing to continue. I don't know but they may be interested in restarting the clock on the statute of limitations. I'm suspicous that they want or need to send a new "notice of default." Currently it is either 3 or 6 months before they can file foreclosure. Check on it under CFPB.
It's not what you think, oddly enough. CA Law is completely bizarre. When a lender wants to foreclose, they hire a "trustee" company which is an independent third party that looks at the situation, issues a formal notice of default, and then after the NOD is not cured, files a Notice of Trustee Sale. CA is a mixed Judicial, and Non-Judicial State, and universally speaking, almost every mortgage foreclosure is done non-judicial.
The independent trustee is not an entity like the Bank of New York Mellon or US Bank, as many of us know, as the trustee for our Mortgage Trust.
In order to set aside the sale, you have to file a lawsuit against the original lender, or servicer of the loan and then hope the judge issues a TRO (Temporary Restraining Order) on the sale.
Your other option is to file bankruptcy, wait out the lift from the automatic stay, and then have your spouse do the same. That usually only gets you a year though.
Unlike NY, and a few other states, CA has NOT decided to enact a statute or law involving the statute of limitations on foreclosure actions. There are literally thousands of people getting foreclosed on right now, for second mortgages and in-famous "no equity" swimming pool loans that haven't been paid in over a decade or more.
I really don't know what the answer is for Razmik. I know of no competent attornies in CA. Isisis is the only expert that I know of, in that state.