Got a lemon - OpticsPlanet Exclusive Swampfox Sentinel 1x16mm Ultra Compact Micro Red Dot Sight

My buddy and I got the same optic for our Hellcats. His sighted in with ease, but we never could sight in mine. We tried a couple times at the range to get it to work, but was always way left no matter how much we adjusted it. Finally took it off and switched to iron sights. Meant to send it back, but it’s just been sitting on the shelf for awhile now. Was hopeful, heard things about swampfox (my buddies works fine) but definitely sketched out that I got one that won’t sight in.