These calls all originate from overseas. No chance of ever holding them accountable. If you want to make their lives miserable and have some fun in the process, forward the call to the Jolly Roger Telephone Company.
Illegal nuisance call operations using cheap foreign labor and/or being directed by criminals in South Asia to target Americans always have a footprint on US soil. Often it's the guy working with or as the payment processor. Major busts by the FTC and Florida AG Bondi have proven the existence of this "local ranch herder" business model many times over. I never said finding that herder was easy, but it's possible.
If you tell them not to call and they continue, you can sue in small claims court. Of course, then you have to figure out how to collect. If they're overseas, that could be a problem.
I just got a call from this number and answered it. It was a recorded message about lowering my interest rates. I just hung up. I know not to answer it from now on.
There may be regulations for US companies, why would you think some smelly 3rd world thief would care what the law is, calling about an illegal credit card theft scam?