1. Is your sighting problem mostly left-right windage, or up-down elevation, or all-over-the-place?
2. Have you yet tried a decently wide variety of ammo in the gun?
If it were me, I'd try to narrow down these two variables, with written notes and targets, before seeking a repair. Sometimes a gun is terminally "broke." But in my experience that is uncommon and the problem is either in the sight adjustment, the ammo being used, or the "hold" and trigger pull of the shooter.
If you were to post here a photo of a typical target that you shot with this gun, uncorrected, you likely will receive some good advice about what to try next to correct the defect. Folks here don't laugh at you - they/we are here to help. It is the virtue of the forum.