It samsungs fault as its a samsung product!
No it's not... If it's a reputable website then contact them and they will repair under warranty or replace.
Who is the reputable website you purchased your buds from?
Selling grey imports is not a sign of a reputable company.
Amazon have been know to sell EU hardware to UK Consumers. They have done it to me in the past. I wouldn't say that Amazon was not a reputable company?
My point being is that it's possible for the consumer to end up with a grey import even though they paid full retail price unknowingly. In this case, as the OP hasn't provided any information as to where they obtained them I'm guessing he/she purchased them at a lower price point fully aware they were grey imports.