PC Link ignoring request for warranty exchange

I purchased a Corsair 650w RMi modular | CP- ********** -EU power supply from PC Link last year (Order #38692). It has recently started making a loud popping noise and sparking when I turn it on after it's been off for more than an hour or so. I have been advised that this is a sign that it is failing and should be replaced. I attempted to contact PC Link to find out how to return it for a replacement under the warranty. It was bought less than a year ago. I have sent their support address three emails to which I have yet to receive more than an automated response nearly two weeks later. I cannot call from work and they're not open on weekends so I have no other way to contact them. Why have a support email address listed on your webpage if you're going to ignore it?