Looks like the prisms maybe misaligned. How is the view through the eyepieces?

If you’re going to return I would check out this Parco option. Same microscope head at a fraction of the cost.

https://www.amazon.com/Scientific-Simul-Focal-Trinocular-Microscope-Magnification/dp/B089N5G9XV/ref=mp_s_a_1_5?crid=2QHO96DXZEV0Q&keywords=parco+trinocular&qid=1639570417&sprefix=parco+trinoc%2Caps%2C81&sr=8-5