Seller shipped item but the package was empty

Has anyone run in to this before? I bought a beautiful Aritzia wool coat from a seller who has so many listings, and is posting about 20 items a day. They had positive reviews so I gave it a shot.

The first time I bought the item, it took them over a week to “ship” it. When the next week came and passed its delivery date, (no tracking updates at all since the label was created) I reached out to PM and they cancelled the order and gave me a full refund.

The seller reached out to me a couple days later expression their apologies because they broke their arm and “thought they had messaged all of their buyers” but missed me. They seemed nice enough. They offered to post the listing again for the price I bought it for, and I agreed and purchased the item once again.

Four days pass and they finally ship the item, and it gets delivered to my mailbox after a week. I’m so excited I immediately walk to the box to get it and pulled out a very large blue Urban Outfitters bag with a small rip (maybe about four or five inches) and an empty package. The weight on the package said it weighed 0.750kg at shipment. To compare, I also received a package from another seller that contained a polyester dress which weighed 0.456kg, to put in perspective. The wool coat was never inside the package.

I reached out to PM immediately and was issued a refund 24h later but I’m left with a sour taste in my mouth and wary of other sellers.

Has anyone had a similar issue happen? I’m so confused why this happened and can’t think of what their endgame or reason for this was.