do I understand?
So you are getting HIGH pellet hits, right? Can't adjust the impact down far enough on the target? If so,,,,that usually means that someone has let the barrel snap shut under it's own 'gas power'. Look to see if you can see how the barrel aligns with the tubular receiver. It probably angles up noticably. No problem though. You can or someone experienced can remove the barrel and lock it in a vise and bend the barrel back down. Some do it by actually slamming the barrel over a wooden stump or table edge but I wouldn't recommend that. I use a barrel vise with hardwood blocks to lock the rectangular barrel monoblock down tight. Barrel has been removed from the rifle's receiver. Then it is fairly easy to bend the barrel down, being very careful to not overdo it. Use stainless steel rulers of 2 or 3' length aligned with flat on the monoblock to check your 'adjustment' progress.
I've seen several spring piston break barrel rifles in this condition. Some will have the stock cracked as well. Your stock is laminate I believe and probably survived the accidental barrel snap up better than the beech stocks do.