@sarong13 - absolutely agree with everyone else and return bag to reseller. Fight it with your CC if you have to.
Just wanted to share I had a smelly bag replaced by H. The replacement bag also smelled. H would have taken it back, but not replaced or something. Do not remember so many years ago. In any case, I put my birkin in the freezer (wrapped in plastic so it would not get damp) for xxx days. It killed the smell. NOTE - I do not endorse this for others and don't want to be accountable for any one else's care decision, just saying it worked in my case. I posted about this years ago.
The B is still one of my favorites and has been well loved by me all these years later. It also has a sentimental connection for me with a dear tPFer who was my H guide all those years ago.