Left side of headphones don't work

I've recently got these Adidas headphones for my birthday (Dec 23) and I have actually been using them quite a lot. Recently, i've found out "Bass boosted songs" and been playing them pretty loudly with my headphones. They took the Bass really well and didn't seem to have any problems, until today. I played a song with my headphones plugged in (Non bass boosted) and the left side started glitching out and stopped working. I tried going in settings and changing the headphone volume bar, changing the song, replaced the plugin port and still didn't work. They were expensive and I love these so much! Help please?