No speaky?

While I'm at work, the people I call for surveys sometimes pretend they don't speak English. How do I know they're pretending? This is how:

*Ring Ring*

Them: "Hello, this is the Robinson residence."

Me: "Hi, we are doing a survey today and we'd like to include your opinions in it. Is that okay?"

Them: "NO SPEAKY ENGLAIS!"

*Click*

When this happens, I totally want to fake them out and force them to take back their imaginary language barrier by saying something like,

"Oh no! That's too bad. We were rewarding our participants today with a $500 gift card. Well, see-ya."

It would be kind of like the old cliche technique of scaring a fake-paraplegic out of his unnecessary wheelchair by yelling "Fire!" ...but less 90's sitcom-ish.