Fortnite sounds the other way around?

I have a problem. I bought a new headset from Saturn the day before yesterday. The Razer kraken x. Now I plug it in and when I'm in Fortnite I hear the sounds that should be on the right side on the left side. When I fight some in front of me it sounds like they are fighting behind me. And I didn't buy a headset so I put it on the wrong way so that it runs normally… The mic on the left side is like normal.

It is extremely annoying and urgently need help. Habs sorround already made no difference.

Maybe the right drivers are missing

Or an incorrect setting in the settings at fortnite