sandisk ultra dual usb drive is not working

Product code: SDDD 032G G46
Product Description: SDDD 032G DUAL DRIVE 32 GB
IS NOT WORKING AND NOT REPONDING IN MOBILE AND COMPUTER BOTH.ALSO UNABLE TO FORMAT THIS PENDRIVE.WHEN I INSERT THIS TO COPUTER THEN ASK FOR FORMAT BUT UNABLE TO FORMAT
MY NAME IS Rabi singh
Mobile no. Is 9804548900

Return it to the seller.