http://resolutioncenter.ebay.ca/
I really don't understand why anyone actually bothers to PHONE eBay about problems.
More to the point I really don't understand why the eBay clerks don't just tell you to go to the above link and start the robots working on your refund.
There is no need to get some minimum wage clerk in the Phillipines involved. No human intervention is necessary or even useful.
http://resolutioncenter.ebay.ca/ is the Resolution Centre. You have an Item Not As Described. With GSP you don't even have to return the unwanted/damaged item. It's all automatic.
Try it. It may not be too late.
However, if that doesn't work, go to the credit card you really paid with (Paypal is just a useful mediator) and call the 1-800 customer service number . Ask about a chargeback. Have your transaction information handy to help the rep process your refund.