First, make sure the base is positioned correctly and fastened tight. Make sure the rings are the same height and are tight as well. Don't just look at it, make sure they have at least 15-20 inch lbs of pressure. (Snugged tight, esp the base). Make sure the bolts holding the barrel of the bow to the stock are tight.
Now see if the scope TRACKS. Turn it all the way down and shoot at a bag target from not more than 10 yards. Then turn it up 10 -20 clicks and shoot again - AMING AT THE SAME SPOT as the first shot, from the same distance. Did the second shot impact higher? If not, it could be the scope's reticule is loose (broken). Just to make sure turn it up another 12 clicks and try again. Still no change? It's definitely broken.
If it did move, you could try shimming the front ring. I use pieces of aluminum can cut to the same with as the bottom of the ring, covering only that half of the ring. I would not use more than 2 layers of shims, too subject to slippage.
Assuming the scope is mounted correctly and tracks, then there may be several issues. I'd start by changing the scope AFTER making sure the bow is assembled correctly and tightened down well.
Good luck.