Error when trying to sell a branded product listed as generic

Hi,

Does anyone know how to resolve the issue where someone has put the brand as Generic, but it obviously isn't a generic product. It's like putting a pair of Nike trainers, or cadbury chocolate as generic, obviously it's supposed to be Nike or Cadbury. I feel people are manipulating the system. This product sells really well but I can't sell on the same listing because its locked under generic.

Any help or experience would be appreciated.