Did you ever get this fixed?

I see over 1100 reads, but no replies.

A little more info would help like what material, temp, and slicer used (and did you check and see if supports are required).

You can rule out a mechanical issue by printing something simple like a cube stretched in the z axis a little taller than where your print is messing up.

If that prints ok, then you can most likely rule out any mechanical issues, and look into slicer settings.