I have purchased headphones from them in the past, so I know they're a genuine company, and I probably get the same emails you're getting (last one was a newsletter yesterday). However, if you haven't used them, then it's a bit odd they would be sending you emails. According to Companies House, they only moved to Dolphin Way in May this year from Chartwell Business Park, Lancing (you can still see their old place on Google Streetview).