Unopened Air Return After 14-days

No, you can't. No one cares if you had the chance / time / mood to open it or not at the store. You have 14 days "after purchase" to return it, and not "14 days after you open it"...

 

Unlikely, but if it is still sealed in the cellophane they may accept it back if you state you were away.

You should have rang first before the 14 days were up to allow them to make a note of the impending return and they may have been accommodating.

 

Most Apple Store managers will accept a return up to 30 days after purchase if you're returning the product to buy another - ideally, an upgrade. If yours is still sealed, returning it for credit or refund may be less of a challenge. The trick is to move the issue up to the manager on duty, which is sometimes difficult.