SanDisk Cruzer Blade

i bought this from argos
SanDisk Cruzer Blade USB 2.0 Flash Drive 3 Pack - 16GB £17.99

two works great the other stick which is the 3rd stick does not format says error unable to format
there brand new only bought a few days ago …
have always bought sandisk usb sticks this is my first faulty usb stick …
i tried disk manager format nothing says same unable to format usb stick …any help with exchange it or do i take it back to argos

i have sent all details in support waiting for a support to get back to me while waiting i would paste here

i tried the stick in a laptop same error …

thanks

While you could return it to SanDisk it would take time.  Fastest fix is to return it to Argos.

http://kb.sandisk.com/app/answers/detail/a_id/5232/~/return-material-authorization-(rma)-process