Item delivered yet amazon refunded?

Question I sold a +$200 item, shipped it next day and arrived 2 days after.

Buyer waited 2 weeks and opened a claim stating he didn’t receive it.

I showed proof of delivery, tracking # and a photo of his house with the box at the door. No answer so AZ closed.

He then opened an appeal and amazon refunded the buyer the full amount. I then opened an appeal asking why was he refunded when theres photo proof of delivery.

Amazon said they will not change their decision and not to ship a replacement as he was already refunded.

So now here i am no item and no $. Can’t complain to credit card either. Whats next? File a police report for theft? Any idea/suggestions is appreciated. Thx