I had a problem ordering a supplement online, paid with paypal. Shipment was coming from Germany. Since I have a credit card linked to paypal, I went directly to the credit card company and filed a dispute. The charges were credited back to me in short order.
The dispute process via paypal seemed like a pain in the arse, so I didn't mess with them. Did get an email from paypal saying I couldn't file a dispute with them since I went straight to the credit card company. A okay with me! So maybe that's an option for you?