Generally speaking it is a BAD idea to go through eBay or Paypal. You can try it to start but if it takes over 5 days, call up your credit card company and dispute the charges through them.
Paypal is nothing more than a credit card processing company that has somehow convinced people to treat them as more than that. Don't. Visa/MC/AMEX/Discovery are the ones that actually have the power. Dispute through them.
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