There is. They can enforce the law. Just nobody does that. Its much easier to write the law, take credit for it, and let it rot.
This is a famous case that has been written up all over the place in the media because so many people get these calls. Just Google "Rachel at Credit Card Services."
There's not much they can do.
CCS swaps out phone numbers and changes corporate entities so often that no one can keep up. I can't block them; it's a different number every time they call. I get these calls at home and on my cell. Both my numbers are long-time Do Not Call list entries.
When the law catches up, if it ever does get close, then that corporation the warrant is for, or the charges are filed against, is defunct. They are now a new corporation. And so on. They claim to offer credit remediation for cardholders over their heads, but what they really do is offer an $800-$2,000 "service" that basically does all the remediation that the cardholder could have done him or herself for free. And they keep trying to punch the well deeper once someone agrees to the "service."
That "service," too, is a slick move. Because if they are actually offering a "product" or "service," and they do deliver it when the customer (or as I like to call them, the "mark") requests it, then by law it is not a scam. They just make zillions of calls and if they get even 1%, that's a lot of cash.
What this really is, is the price I pay for doing business on the Net, where it is so very easy to scrape and sell a known-good phone number. That's why I have not handed out my number to the myriad of sites asking me for it "for security reasons." But when I make an order, it has to be provided.