Keep searching. I find evenings to be lucky, i figure folks adjust there plans after talking to their significant other. Waitlist only updates every so often and in demand rooms will often come and go before the waitlist picks them up.
I can only say, anecdotally, what happened for both my waitlists, I called and customer service *coincidentally* said my waitlist was coming through at that VERY second. I find it very hard to believe two random times coincided with the waitlist. I'm thinking stalking the site and you doing it on your own is faster/more likely to work and it's a happy accident if "someone" happens to pay attention to the waitlists and inputs the changes necessary to make it happen.