Apple Watch replacement

My watch stopped working, i had to make an appointment with the apple store, I drove there and met with someone who said they had to send my watch in, I received an email from apple saying they were replacing my watch on October 19, and I should have it in 2-5 days, I still have not received it, when I check the fed ex tracking number they say they never received it, I’m very frustrated that I have been without my watch for a couple of weeks now, I use it to track my health, exercise and movement! All the reasons I got it in the first place!