damn if cheats aren't even working, you're gonna have to look up if anyone's figured out how to clip out of the invisible wall in this version yet, ways out get patched every update
if you've backed up your world you could try to use the delete command on the hook itself? (cheats in sandbox are accessed with 0 on the numpad), but beware you can delete literally anything and everything with it, including the map itself if your cursor is overlapped with the terrain at all