I am so sorry this happened to you. I had a somewhat similar experience, and I was reimbursed for the item, though it took some time for them to complete a full investigation.
I wouldn't usually post sensitive information on a public thread, but I have had two situations recently with them, though they are both a bit different. One was a pair of earrings for ~$15k that I shipped to consign with them; the package showed delivery but my selling page never updated. I called them and they launched an investigation, though clearly someone stole it along the way. I don't know if it was the shipping service or at Fashionphile. After about a month, Fashionphile paid me for the earrings, likely through their insurance plan. Now again, just today, I was wondering why a bracelet that I ordered on Friday, about $14k, had not yet shipped. I contacted customer service and they said that while looking for the item in order to ship it, it had gone missing and they cannot locate it. It definitely seems like someone is stealing items at Fashionphile, but I don't understand why this is still going on, as I'm sure that they have cameras everywhere.