It's difficult sometimes.
I bought something from China, fully aware it would take maybe a couple of weeks to arrive. It didn't. I got in touch and the seller, although very co-operative - urged me to wait longer. I did, but then my period in which I could make a claim was running out - the seller was still urging me to wait. I made the claim which took two weeks to complete and then, three weeks after that, my item arrived.
No, I didn't get back in touch with the seller, as the item was only worth a few quid and 9 weeks to delivery is ridiculous, however, if it had been an expensive item I'd really would have had to consider refunding *part* of the cash back to the seller.
All the same, if someone is selling internationally it is up to them to make sure they have access to a method of delivery that guarantees success within a reasonable period of time.
G.