Upgrade Eligibility not reverting back after cancelled iPhone 6 Plus preorder through Apple.com

I'd preordered an iPhone 6 Plus through the Apple.com website, then cancelled it because I was going to camp out overnight for launch day. When I got to the front of the line, my upgrade eligibility had not reverted back, and I was not able to upgrade to the 6 Plus. I walked away empty handed and livid.

More than a week has passed since then, and my eligibility has not reverted. I've called AT&T support several times, and I've even gotten a case number, but it doesn't seem to have done any good.

Even if I were to find a 6 Plus at this point, I still couldn't upgrade.