I gathered that. I'm on the state do not call list, the federal DNC list. My home and cell phone are on it, yet I still get plagued.
If you google the numbers they originate from REALLY obscure locations like rural North Dakota, or high desert California.
These people are snakes.
I've given up trying to get them to leave me alone.
Screaming, preaching, etc. doesn't work.
The only advice I can give is do NOT answer the phone. Ever.
Because it is usually a robocaller, and once they know they have a live one, they'll call back, with a real "salesperson".
I keep my phone turned off most of the time.