If it is faulty and you return it, they should give you a new one.
Imported keyboard and besides, Steelseries has no warranty at our country.
Anyway, as people said, it's unfortunately a faulty switch, something that can happen with
any brand since it's Cherry who produces them. Just like what happens with some bad OMRON switches as well on lots of brands such as Logitech, Steelseries, Thermaltake, Corsair, Razer, Mionix...
It's something unavoidable, as most companies don't test properly their keyboards before sending them and it's Cherry's fault, not really Steelseries..
What you can really do next time is either buy a keyboard from a company with a good quality assurance control (like FILCO), buy a keyboard from a company that officially sells their keyboard in Brazil and has warranty over here (such as Thermaltake or Cooler Master) or buy a keyboard with a PCB Mount, so it's a lot easier to remove the switches (such as the PLUM 96).