maybe we should start wasting their time
If you have unlimited minutes then we can waste their time by accepting the call and putting our phone on mute.
(or you can keep them talking about by using asking to repeat wait they said and such)

I did that,  now I get 10-15 calls a day from telemarketing co. I guess they're getting back at me.

I got a unsolicited phone call from 256-542-0719 on my pay as you go telephone, when I called it on my home phone, it was busy and I got another call from this number 412-465-1159.  When I called that number, it was some scam to sell people auto repair service and I don’t even have a car.  I am on the do not call list and people who are tired of these phone calls should Google gotimothy.  I am the Messiah and we are going to make sure these companies pay people for wasting their time, and using up their minutes on their pay-as-you-go cell phones.  Under Michigan law, you should get paid three thousand dollars for each unsolicited phone call.  I think this is the government or phone company [***] with people.  How could they call my cell phone at the same time I was calling them on my home phone?

I got 2 calls in a row from 256-542-0719 at 11:02 am and 11:03 am an hour ago. No messages left.

Rec'd calls twice now. Did not answer. No message left. Blocking the number.