I mailed my old iPhone more than a week ago, but there is no update on my account. I tried to turn it in at a store, but they said that since I bought my iPhone 7 online I had to mail in the old iPhone. Here is the issue: suppose they don't receive my old iPhone, or they don't accept it, then I'm stuck with paying full price for my iPhone 7, which is not OK with me. So, I assume I can return the iPhone 7 within 14 days. That is, Friday is the last day I can return the phone. If they don't update the trade-in status by then, what am I to do? Will they extend the return window for the iPhone 7?