One Day Only - Non existent after sales service and no contact number to follow up on faulty products

This company is almost ********** in how they conduct their after sales service.. I received a faulty product from them - emails to this effect were never answered, there is no contact phone number and only after writing fairly damning posts on their FB page was I actually contacted (5 weeks later). It took another couple of weeks before the faulty headphones were collected and a response promised within 7 working days. Now at 17 days I have not heard a word. So currently they have my money and the product. And there is no way to successfully contact them to get it sorted. The FB page is littered with similar complaints.