Flawed Exchange process

I have now sent back a digital photo frame 3 times as it is faulty, shows some photos as hazy, then eventually turns off for no reason and I battle to turn it on- same story for all 3 replacements. I have asked for it to be replaced with a different colour frame (as I got a Silver one at the same time and it works perfectly and hasn't stopped working since I got it). I am unable to find a contact number on the website and I have tried explaining my problem on my returns report- but I don't think anyone is reading it, otherwise they have no idea how to change the process.