Keeping in mind if it passes 45 days (or maybe 90?) you haven't got a leg to stand on with PayPal for a refund.
Do you have tracking confirmation numbers? If it ever was shipped they will be listed with your purchase information at Ebay. Click those numbers and see if it was ever shipped and where it is currently.
If no shipping confirmation to track with APPLY TO PAYPAL FOR A REFUND
Five weeks is ridiculous ...