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Yet another prime example for the AT&T works great for me crowd.

'When' something goes wrong with an AT&T service, you are given the runaround.

No wonder these clowns are rated dead last for customer service.

It hasn't been demonstrated that the problem is AT&T's. It's not in their system. You start the inquiries at the source (Apple). And J. D. Power rated AT&T's customer service #1 this year.

no, its the OP

it takes a few days to process a cancelled order to free up an upgrade

It can for one reason or another, but the process is supposed to be "quick" as in immediate. However, if you cancel / return more than once in a short period of time they impose a "cooling off" period where your eligibility return is delayed (like incorrect PIN attempts on your phone). Sorry, I don't have the details.
 
It took me 2 days for my upgrade to reset a few years ago when I returned an iPhone with a bad battery to AT&T. The AT&T guy warned me when I was returning that it likely wouldn't reset immediately.
 
That's crazy. I returned mine and they credited it back right then.

Ditto. I ended up canceling my online order from AT&T yesterday morning due to the extended wait--because my iP5's battery is on its last legs. The upgrade eligibility was restored within the hour (I didn't check sooner than that, TBH)' and they released the hold on the funds in my bank account sometime this morning.
 
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