https://www.cbsnews.com/news/beware-new ... r-me-scam/
You don't have to actually believe the scam to get scammed, you only have to say "yes" during the phone call.
But how can you get charged if you don’t provide a payment method? The con artist already has your phone number, and many phone providers pass through third-party charges.
In addition, the criminal may have already collected some of your personal information -- a credit card number or cable bill, perhaps -- as the result of a data breach. When the victim disputes the charge, the crook can then counter that he or she has your assent on a recorded line.
That part I highlighted is extra disgusting to me TBH, though not exactly surprising - I'm also remembering when text message spam started being a thing, and phone providers would charge people for IM spam they received. This kind of shit is why I'm a huge believer in regulation.