Hello! My name is*****I am a certified computer professional who will assist you.
The best way to dismiss that pending dispute is to call PayPal again and let them know what happened. They should be able to immediately cancel the dispute. However, if you eventually do see a refund on your bank statement even though you requested cancellation, you can contact the seller and let them know that you received the item after all, and that you would like to pay them for it. The seller should then tell you how to do it.
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For any other question, let me know. I will gladly help you again.