Here's the story:

- I buy an uppipe for my Subie from Ebay, it's a "buy me now" deal.

- I pay the guy immediately through PayPal.

- Transaction seemed to go through properly. Now I wait for the part.

- Don't hear back for a couple of days, then I get a message that the part is back ordered.

- Seller mentions I can get full refund or $10 back and wait for new shipment.

- Send two emails within a span of 1.5 weeks. No response til today

- Check my PayPal to see I've been refunded and a note saying, "Sorry, we had the part in stock, but needed to ship them to another customer. The customer did not pay within the last 2 weeks until I reported a non-payment. Now the payment is received and the part has been sent to that customer"

Question: What would you do? How would you react?