Lost package got delivered with new package
I bought something for a present for my wife off of an online company which I found was in China. The tracking info looked like it got stuck somewhere so I wrote them and they resent my package. However today I somehow received both shipments. I've only been charged once. I obviously want to do the right thing here and return it but it's in China. Should I bother writing them and asking about it? Would they get it if I just wrote Return to Sender on it?