While I agree about the package scope being a weak link I assume this config was bought due to budgetary reasons, so unlikely you'll trash it at this point based on our suggestion to do so.

So the first thing I would do is check the mounts - bases and rings screws. If that checks out ok, I would agree with the suggest to empoly some help of a buddy, etc. I think we've all had those days and doubting our equipment certainly doesn't help when saddling up behind it. Some sandbags for a rest to help steady things- a must IMO. Don't keep shooting, 1 group of 3 shots then break - no rush. Don't make any adjustments until you can verify its grouping with some normality. Chasing a bullis a sure way to a big headache.

By your description I suspect either scope/mount or shooter error. Try addressing these areas first. If you can get a spare verified scope to tryat the rangein the event nothing is solved with mounts, rest or shooting tech.

Good Luck