I can't tell you how many robo calls I get a day ( on my cell phone!) If it's the the guy with the accent from Microsoft I like to play around with him...pretending I'm doing what he is asking. Or I tell him omg my computer just blew up and start freaking out. Or I tell him I own 12 computers, which one do I need to fix. I also where he is located and he tells me Manhattan and I tell him that his accent accent isn't accepted is NYC. Lol. Often they get inappropriate and ask me what I want for Christmas and sexual questions and that's when I hang up.
But the real annoying ones are the robot ones where you can't talk to a freaking person...and if you do, you tell them u don't want to be called anymore (I'm a little more harsh and direct). And you still get phone calls from them. Depending on my mood, if they are trying to sell something, i tell them "if you pay my student loans, I'll buy your product."
If they ask for someone particular, you could say they died but I prefer not to go that route...if you get my point...