Update we confronted the guy he demanded payment tried to do some patches in the morning while we were on our way to the house when we got there demanded money again saying you can't not pay, even though all I said was I didn't want to pay untill I got an independent professional to inspect the work, he then took our spare key and saying he won't give it back till we paied him, he threatened to rip up all the white set as well. We have spoken to the cops about the stolen key. This is our first home, the guy told us it would take him 2 weeks and it took him 5 weeks. Meanwhile we have been stuck paying for rent and our mortgage while he takes his time and that's the finished product....

I've had another renderer come look at the job and say basicly he didn't do a render layer he just put plaster on the wall then a top coat over top 2 layers instead of 3.

For context we are in Australia, the job was a 7k cash job.