Well, it's kind of silly to me. Complain about not sending out a notification, but apparently they did send one out with the new date. OK, now complain that it wasn't worded the right way or in a way to draw your attention, etc.
I think next time they just need to a disclaimer, promo may expire at any time if survey quota met or something. Seems the easiest way outside of issuing a unique coupon code for each user and then stopping the survey once they fill up.
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