The left earcup on my headphones broke. How do I fix it?

[HeavensGamer500]

So, I've had these headphones for a few weeks, and just a few days ago, the left cup went dead. It will not make any sound. Not even when I press it against my ear. The right cup works like a charm, but I would like to fix my headphones. How do I fix it?

 

[13thmonkey]

take them back to where you got them from. wiggle the cable at the plug end

 

[das_stig]

Take them back to seller, UK consumer law gives you 28 days from purchase if they go faulty, after that a minimum of year to manufacturer, of course they only have to honour this if no user damage and I'm sure it's not in your case.