Permanently Deleted
If you know how to solder it's pretty easy. Headphone problems are 95 times out of 100 some problem with the plug/jack, so if you swap that out you should be good. Feel free to DM if you need a walkthrough.
Without soldering it's pretty much impossible, but soldering really isn't that hard especially with something like headphone jacks.
if it is that easy, well I'm definitively reassured, I'll try my best on my own for now
good luck! don't worry about it — it can be a little finicky but you can totally manage it.
I've found the cheaper the headphone (~$5), the more difficult it is to repair. So you have that working for you! IME cheap headphone cord is 99.5% insulation and hides the copper. I'd use a continuity tester on the cables first to make sure you need to crack open the headset.
This guy has a mod that I would do I I had these headphones, starts here https://youtu.be/l93ibiQA63M?t=406 the instructions he gives will also give you access to the part you will need to repair if it's in the headset. If You look further on youtube, you might be able to find someone completely taking apart a pair. I realize it isn't for your exact model, but it at least seems closely related and the construction he talks about is common. My Monoprice $15 headphones were made that way too. Though it looks like your model doesn't have the locking connector part, it's just 2.5mm for some reason.
Soldering skill is good to have especially when you like stereo equipment and can't afford a new whatever every time something goes wrong.