It doesn't matter where you buy it from, Apple Care (800-MYA-PPLE) is supposed to handle all warranty issues.
Since you called twice, you have been issued two case numbers.
When did you buy your iPad?
Your Apple device is covered for 1 year, but you can only call AppleCare for the first 90 days (unless you purchased AppleCare, then you get 2 years of phone service). So the only time AppleCare will deny you phone service is if you are out of your phone support period (90 days) and decline to pay the $39 for the phone call.