Our company with multiple lines from Verizon often suffered from Cramming. A website charge, 411 services, advertising services, a FTP charge, etc for services from 3rd parties that we never ordered.
We would call Verizon and complain about the fraud. Verizon's response was that federal law required them to add services to the bill from 3rd parties. Verizon reps say they have no control over the issue and that we would have to contact the 3rd party to get the billings to stop.
Verizon would add these services to our account despite having our bill having an anti-cramming feature already and a requirement for a pin number to make changes to the account.
We got the last laugh though both on Verizon and these Crammers by canceling our multi-line phone account and going VOIP. No phone bill anymore.
Try adding services to that. LOL.