I'm shaking & freaking out right now!!! HELP HELP!!!!

Doesn't sound as if there is going to be anything you can do, unfortunately. It's kind of your word against theirs. I'm so sorry! Hopefully you can sell it on Ebay and not take too much of a beating.

I will never purchase anything on E-Luxury after hearing about this.
 
Think one of the problems is they say the bag is not defective, which is the truth. In your communication with them, did you tell them it was Used... and in no way are you saying this bag was defective. After going back and reading some of your posts, that may be the problem and not sure how you can correct this now.
I would put in writing to BBB, your CC and to elux, the problem is used not defective merchandise and that is why you were sending it back and that others have had the same problem recently