Seller has perfect feedback.
Feedback for selling phones? Or for something else?
File a "not as described" claim within thirty days of receipt.
https://www.ebay.com/help/buying/returns-items-not-received-refunds-buyers/return-item-refund?id=404...
Return the clay for a full refund at the seller's expense. If the seller does not cooperate by providing a prepaid return label or refunding you when the tracking shows delivery back to the seller, ask eBay to step in and refund you directly.
