They darn well ought to repair it. Send it, its original packaging, your proof of purchase (print it out and put it in the box, that way they can get moving with that information already) and whatever else they say to send. Be very clear it was DOA, and if they ask, describe what you tried, action by action if needed so there is no room for them to misunderstand precisely what you did or didn't do to try to get it working, and why you're sure it's dead.
You paid 'em $1000 for a working drone. You have not yet received a working drone. Once they know this to be the case, legally they still owe you a working drone. (Might have problems of its own, and they reserve the right to send you a refurbished one, which is no fiun to think about, but if it doesn't work, you don't have to accept, legally.)
In my case, I had a Mavic I could fly but had incurable gimbal vibrations, and they replaced it without costing me a thing. Even a prepaid shipping label out to them.
I think and hope they'll do the same for you.
Could take a few weeks, unfortunately. But I think it'll be a free replacement once they've heard enough explanation, and it sounds like they have given that you're waiting for their instructions for shipping it back.
Good luck with your second Mav when it comes.