Did you pay as gift or via regular payment? That surprises me. Was there tracking and signature?
I made a purchase via Paypal through a non-affiliated site like apug. The item arrived but did not match the description. It eventually led to a Paypal dispute and a return for a refund.
To the OP, PayPal has a lot of information online. I'd suggest reading the information they have posted on disputes, tracking, etc. There are a lot of special details and special cases to keep in mind.