I have a pay as you go telephone with Verison. It cost $2.00 a day to use. But I only have it for emergencies. When I ope the phone it answers the call. This is the second day I have had to pay for a call from a robocall device .
If you call and can manage to get on the dial tone line again (you got lucky, and got on an outgoing PBX node) dial 911 on it and scream "help someones trying to kill me" then hang up. Police will be dispatched to that numbers address. I called but wasn't lucky enough to get a dial tone. Just busy signals. I'm going to try a few more times and do the aforementioned. I bet they stop with the calls then.