What do I do if the Massaman Curry Tastes Like a Monkey's Blue Nuts

Ok, holier-than-thou smartass know-it-alls – riddle me this:

Last night we ordered takeout from the Premier Executive Member of our ordering-in rotation: BEET FUCKING THAI, all praises due. It goes without saying that Beet is usually Park Slope's pinnacle of consistency and excellence...

Last night however, though the Pad Thai was fantastic as usual, the Massaman Curry literally tasted as if a small monkey had burnt his nuts while trying to piss in the broth. We almost threw up from the acidic smell and urinish taste - and that's coming from us; a couple that's "hella" into golden showers!

Here's my question to you:

Since we are valued customers whose phone number is more than respected by the frantic Beet receptionist, we really wanted to take the dish back. It's not like we're first timers - I really thought that we'd carry a little street cred because of our stature, thus we might be able to just walk in there and say:

Listen, love you guys, we're here all the time - ALL the time: check the log files! - but goddamn if it doesn't taste like your little monkey back there got into the soup. Or the curry, whetever the fuck this shit is supposed to be. You gotta admit it looks a little soupy tonight. Now, we're already full of course, that pad thai packs a punch, but what would you say to a little gift certificate action - or even a refund?

Instead I threw the carton in the trash without recycling. I didn't say shit to Beet because I have an INGRAINED TERROR of sending back food. I know for a FACT that staffers loooooove to throw a little wink-wink-special-sauce in anything that a customer sends back to the kitchen, so I NEVER do it, even when it already has the monkeysauce.

Do you ever send food back? Ever ever? What would you have done?