When you're buying from AliExpress (or even eBay at times), you don't really expect a return, or a refund. What you could do is try a charge back with your credit card company.
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I filed a dispute with my CC. it will take a while. I should have used paypal, they seem to act quicker.
I have since replaced both with a Twinstar brand since my local ADA store is a distributor. I hope they work.