Electrical Safety First have issued an URGENT RECALL on the NASV-100 Hair Auto Straightener. If you have this then STOP USING IT NOW! Know someone that has one? Pass this on.
There is a very serious risk of electric shock due to inadequate design and construction. It's important that these are not used at all.
These Straighteners can be purchased via Chinese Sellers on Amazon/eBay, as well as various Chinese based selling sites. If it's been a recent purchase then I would go through the Paypal route for a refund. Amazon are generally good with these sort of issues, so I would contact customer services directly.
If you are struggling to get your money back then you can get in touch with:UK European Consumer Centre: www.ukecc.net, Citizens Advice: www.adviceguide.org.uk, Citizens Advice Helpline: 08454 04 05 06 or Trading Standards: go to www.tradingstandards.gov.uk.