I use a similar type tactic and act like I’m a telemarketer that was making a call outbound right as I received their call. I’ll usually launch into a sales pitch and attempt to sell them an item like an automated backscratcher by Whamo with 3 type sandpaper attachments for different skin types. Or something like this is “Rob from credit card services” in a monotone voice...
It drives them nuts and they hang up...: )
LOLOL :D
That is pretty good!