Let the telemarketers be your entertainment

So, I have been getting harassing calls from the cardholder services company. And no, I do not owe them any money. Looking this up on the most trustworthy of all sources, the internet, I found that a lot of people get these calls.

It starts out saying something along the lines of "We are calling to lower your interest rate" or some jazz. I know I don't have an account from call services so I was a little angry. I pressed 2 to not have them call again, but I don't think that worked.
Then I pressed 1 to talk to a real person. However, as soon as you utter anything about not calling, talking to a supervisor, or anything that deviates from their script; they hang up.
That in itself would not be that bad. Unfortunately, I have also been cursed at before the inevitable.
"Just hang up asshole"
"Motherfucker"
"Fuck off"

Apparently, since I don't have their phone number, no caller id, and their real name is never said, I can not report a violation to the Big Brother.
Well, when they cursed at my child that pushed me too far. Now when they call, I like to play pranks. I have only started but the first was awesome. It shows me that I need to practice my acting.
I answer the phone speaking spanish. The lady on the phone (white girl) kind of paused and asked if I could speak english. I answer "Si"
"Can you answer in English?"
"Si," I say hiding my snicker.
"Hablas ingles," in horrible Spanish.
"Si, yes. Hablo ingles y spanish. Por que why?" I say. My spanish is not that bad but hers is laughable.
"Do you understand in english?"she queries, obviously tired of this game.
"Yes"
"Hi, my name is Kelly"
"Hola, Kelly" in a most cheerful tone.
Click. Damn that ended too soon. Oh this is going to be great.