Unacceptable quality of painter contractor

[Vadim Babets]

Hello BP 

I’m building new construction house, hired painter bid was 15,800 and I buy all material, I paid him 8,000 when job was 80% complete, now I look and horrible quality, they did not putty nail holes on Millwork, can see siding through thin layer of paint, light oversprays on hardwood , cabinets and walls, worse staining job on cedar you will ever see… told him to fix and he paint brushed made it much worse - what do I do?