None whatsoever, as far as I can tell. There is no store as that has disappeared, but this is the info as per Paypal:
Seller's name: 深圳市象蛙科技有限公司
Seller's email: tansey97122@gmail.com
BTW, that translates to: "Shenzhen Elephant Frog Technology Co., Ltd." which corresponds to the return address I was given. However, the address on that company's website is not that given for the return. So my guess is that if I had shipped it back, it would have simply vanished. And I'd be willing to bet that email address is now abandoned.
Wish that had been the name on the store I bought from as that would have warned me off long ago. :)