Not certain I can recommend a fix, but some things to check? Think of your scope as a tube within a tube - those external turrets are moving the inner tube up/down and side to side. If you have the thing all the way up or all the way down, that inner tube will not be able to move left or right. So the elevation turret on top and the windage turret on the side are a screw that pushes only - the threads push on that inner tube as the thread turn in. When you back the screw out, that turret screw does not pull - relying on a bias spring on opposite side (or at 7:30) to push that inner tube back against the screw's end. Broken spring removes ability to follow the screw - might even just flop around inside there. You can take a mirror and place against the Objective end - might need tiny crack to let in light - then look through the eyepiece - you should see two cross hairs - one is real cross hair; other is the reflection. Should be able to see them move when turret screws adjusted - in your case I would try the vertical to verify that the inner tube is not totally frozen or rusted in position. On a scope that is functioning correctly, should be able to turn turrets in or out and get the two images to precisely over lap - the cross hair and its reflection - you are now at exact optical centre of the scope lenses. At that position you have maximum amount of equal left/right and up/down adjustment available. Might be a "short cut" for you - no need to shoot to see if adjustments did anything - just look through at that mirror and see what happens as turret screws get turned in or out. The labels on turret will then be backwards, of course - up is down and left is right, when watching the cross hair.
