Stolen iPhone 4 and follow-up Call from Apple

Question

Hey guys,
My girlfriends iPhone 4 (32GB locked to Rogers) was stolen about a week and a half ago. She had Find My iPhone on it and we used it to lock and clear the phone right away, but since the phone was already turned off we were not able locate it. We get an e-mail the next day from the app saying that the lock and message were sent, which means the person who stole it probably turned it on. We still weren't able to locate the phone using the app so we just assumed they re-formatted the phone, cleared it, and logged out of iCloud. We thought end of story, we lost an iPhone, but there's nothing we could do. We go to an Apple store, tell them the phone was stolen and they proceed to use Find My iPhone to clear and lock the phone again (they say they weren't allowed to brick it and we weren't given the option to report it stolen).
Anyways, fast forward to a week later (night of Monday, Nov 5, 2012). We get a call from apple (call center 512-674-2000). The caller is Betty who works for Apple and she asks us if we have sold an iPhone on kijiji/eBay recently. We tell them that we've actually recently had the phone stolen and ask if someone's returning it. They say not quite, just that someone was tryign to contact apple with the iPhone's serial code. Unfortunately at this point the phone is very low on batter (<10%) so we ask if they can call back at another number. Betty says okay. We don't get a call back.
We call back the apple number that called us, but the call center is closed (it was around 8:15 EST). So we call the Apple Canada Hotline (we're from Toronto). The issue gets escalated to a manager and they're pretty much saying there's no notes on why the call was made. There definately has to be a reason for apple to call us asking if the phone was sold right? They tell us to call the number that called us earlier the following day to see if we can contact Betty who called us earlier. However, they do tell us that they ahve on their record that Betty called us, and prior to that, someone called with an issue about the stolen iPhone's serial code (we had not called in).
So we wait until the next day can call the 512 number. Pretty much we keep getting passed around with people telling us they can't do anything since there's no notes on the file and they can't redirect us to Betty.
My question is: There HAD to be a reason why they called us right? The phone was stolen at a friends house, where we thought we knew everybody. If we can get any information on who the original call was from maybe we can find out who stole the phone? Has anyone had a similar experience or does anyone have any advice on what to do? I'm sure apple knows something, but they are just not telling us. Sorry for the lengthy post, just wanted to get all the details out there! Thanks for any help!

Answer 1

But if an issue is reported using the serial code of the stolen product, could they not tell me what number it was called from?
I understand that they can't do much, but I just wanted to know the original reason why Apple called us in the first place to ask whether we sold the iphone on kijiji or eBay recently.