I've found simply emailing them and asking for a call back to be surprisingly effective, or I in a few cases i stop paying them by changing the billing to a car

I've found simply emailing them and asking for a call back to be surprisingly effective, or I in a few cases i stop paying them by changing the billing to a card that is about to expire. And if necessary the phrase "I will be contacting my state attorney general's office, consumer fraud division, what was your name again?" is the atomic bomb in getting things resolved.