Web offline, no reply to calls or emails

I purchased a reading light for my Oumas Kindle for Christmas, unfortunately it turned out to be faulty which I understand can happen. I let Rocketshop know and they asked me to return it. I couriered it to them and it was signed for on the 2nd Feb 2015. I have phoned there land line number, it says it has been disconnected. I have called Diana's cell phone and left a message, got no response. There web site has gone off line, and they do not reply to emails on two different email addresses.<br> I am concerned that they have gone bust, all I want to know is what has happened to Oumas lamp, and when I will receive a replacement. It is now two months from Christmas and she can't read her Kindle during the load shedding, which was the whole idea behind getting her a lamp.