Some years back I had fun with by using a “Jerky Boy” routine on a spam caller. I went full retard and then finally said I had to ask my mom if I could buy whatever the guy was trying to sell. It was fun....
On a more vulgar route, you could try the Danny deVito “Ruthless People’ routine and say that “Linda” can’t come to the phone because my $#@( is in her mouth.
Any which route, have fun and let your frustrations go...