I don’t care who you think your talking to.. I was scammed by a “granny”. Got a pair of cheap cufflinks back from “her” instead of my iphone 8+. She had much the same story, couldn’t get the phone to work. The cufflinks that got “returned” to me didn’t even come from the same state that I shipped the phone to. I genuinely hope you actually have a “granny”, watch your back though. All this messing with the phone sounds like a good way to send you back a seriously goobered phone and keep the good one.