Also, it's not clear if small claims would have jurisdiction with companies that aren't in the same state.
Additionally, winning in small claims only gives you the right to chase after the award (the court is not going to collect on your behalf) -- so you still have to go to the time, hassle, and expense of trying to collect.
https://www.nbc12.com/2019/12/05/consumers-winning-financial... (robocall specific)
https://www.mahanyertl.com/2018/robocalls-can-sue-telemarket... (conduct your business over mobile)
Specific to business lines, where harassment remains a legal recourse:
https://pocketsense.com/stop-telemarketers-calling-business-...
https://paysimple.com/blog/small-business-tips-for-dealing-w...
https://www.infoworld.com/article/2626467/how-to-sue-telemar...
More to the point, establishing yourself as a litigious asshole may change the counterparty's marketing calculus. Which is the principle point.
Its a regulatory thing, bump the FTC (and in this case ARIN) so they can take action.
Make them jump through a bazillion hoops. Their will bring their managers and directors involved. Make those waste their time as well. Have them write proposals. Get their bosses involved. Have their bosses waste their time. Eventually it would get to an SVP/EVP level of sales which will permanently fix the issue.
It's absurd and I'm glad at least something is starting to be done.