i agree with Jkay, Mary did pioneer the photos and went way beyond what the cartel dealers did at the time. i am sure she looked at your watch before shipping. There is only so much time and effort anyone can put into a rep before shipping. Your problem happened after you received the watch from Mary.
I would think she will let you change models, because that's just not how it works. i would agree with the rest of the guys that you should save the shipping and
the downtime, and find or get a referral of a rep friendly watch repair.
I feel bad for you..There is nothing like a 2 time problem,, and them the seller is overseas...
Good Luck on which ever way you choose to go... I say fix it here. If you do that, she most likely will take money off your nest purchase.
MM