Just sounds like you are in a little bind.

In your situation I would:

Clean gun well including copper solvent.

Check all mountings by strength of hand while gun is firmly mounted in a vise. Looking for loose stock, scope mounts, bases rings.

Look for a bent scope tube, usually right at the power adjustment ring, this is the weakest/thinnest part of the scope.

While gun is locked in vise, adjust power of scope and see if crosshairs jump or move POI.

While gun is locked in vise , tap on scope with hard plastic like screwdriver handle, in worse cases you cand see poi change.

Try new style ammo.

To do these things yourself you will have to be creative and patient.