Contacting the seller is just the first step.
If the seller does not give a useful answer-- which I would consider to be an immediate full refund with no requirement to return the item to China*- immediately open an Item Not As Described dispute.
Do NOT accept an offer of a replacement. It won't be any better and it will arrive past the deadline.
If the Dispute does not work out, go to the credit card you actually paid with (PP is just a mediator), phone the 1-800 customer service number and start a chargeback.
*Because it was from China, right? It always is.