Headphones (bought 2021) - Right side stopped working (Kirkley NR33)

Gaming headphones bought early 2021 - right hand side has stopped working and no idea if that can be fixed or not. They weren't expensive (probably under £20) and as you can see from the photo the padding covering has started to peel off a little. I was going to take them to the household waste site when I have a car load to clear but if anyone wants them they are free to whoever asks first and can collect.