I am underleveled with 5 ultra balls in the distortion world and I accidently saved. Can I get out?
Yes, you can get out, but you'll need to backtrack to the first entrance, which can be tricky if you're a fair way through the puzzle. It's either that or you go to the end of it and face Cyrus and Giratina.
If it helps at all, you can find maps of each area of the Distortion World here.