You could start a not received case, if seller sent to the wrong address, proof of delivery to satisfy ebay needs to be to the address as advised to seller by ebay.
Have you checked to see that all addresses in your details are correct, there are 5 addresses all for different purposes.
However the seller got your address from somewhere, so some investigation should be made to see what is in your personal details, as he would only know the address provided, with the payment details.