Welcome to AGN!
Spring guns require different set ups than normal pb guns, pumpers, CO2 or PCP.
They have a unique, double recoil. When the gun fires it recoils backwards then when the piston hits the top it recoils forwards.
Because of this, spring guns are tough on scopes. They make scopes that are specific for airguns and you can ask around here what's springer rated. I'm sorry idk if yours is but Google should lol
Another thing is you need a very solid base for those. Most people recommend a 1 piece base so there is tons more surface area the base is gripping the rail. Also, lots of 1 piece scope bases have a recoil lug that is like a set screw you screw down thru the base before putting on the scope so the thing doesn't move over recoil.
I've had good luck with UTG one piece scope mounts.
They also make springer "recoil less" mounts by Diana that has 2 rods to keep the scope parallel but then springs to sbsorb the recoil. I've heard those are okay just pricey. Probably find knockoff on ebay ?
If the new base doesn't work then it may be your scope.