tea length wedding guest dresses

I just had a case opened up on me for the first time! Customer saying item not as described even though I provided measurements and pictures of me wearing the dress along with the stock photo! I have it listed for $45, she offered $30 and I accepted. I pressed the dress and took pictures of it before I sent it! This really ticks me off!! My Closet name is michelep007, Blue Chiffon Dress. Don't know how to post just that picture here. How long do I have to wait until I know what Poshmark decides?? tea length wedding guest dresses