I never received the label, or even the address, for returning the "trade-in" old phone
Do other customers get the address for returning the old unit, or is the promise of refund just an advertising gimmick? it seems like a bad-faith act by Apple.
The Trade In kit should arrive a couple of days after you get the new iPhone. It swill contain everything you need to send the iPhone in for the trade in value including the return shipping label.