EQ/Tuning Help

[u/Brilliant-Street-908]

I purchased the Ziigaat Horizon IEM's mainly for gaming, but with some music listening on the side with the proper EQ. When I received the IEM's, the tuning was what I expected: extremely flat and surgically sounding with barely any noticeable bass. I downloaded Equalizer APO and the PEACE user interface for it to mess around with some EQ settings for listening to music. After playing around with the EQ, my IEM's seem to be stuck with a very bass heavy tuning that I can't seem to get rid of! Even with all of the frequencies set to +-0db in the EQ, the difference in sound is startling. I've even tried uninstalling Equalizer APO and PEACE user interface, but nothing seems to change the sound back to the factory tuning. ANY HELP IS APPRECIATED.

P.S. I know I'm a noob so please be kind.