Left job incomplete after quote paid in full

Initially left a very good impression, daily updates on what going to be done, etc, something I sorely missed with the previous contractor. However with the job 95% the problems begun. Cover that was initially going on top was now going at bottom, but I was told I have to pay for it. When I refused, I was left with an incomplete carport that started to rust, so went and paint it over myself. They left a heap of s**** metal on site, did not fill the gaps between solar panels like I was told they going to Now I'm basically being told because I do not want them to do a slab (separate quote, a third higher than their initial quote, which I just cannot afford now) I'm getting punished because the sheeting (coverage) is extra (no idea where the money for the original roof went to?) They had to liaise with my electrician re. solar panels installation, and I was basically told I ran their name into the ground, merely because I shared the truth to someone that asked why the job is not completed. Definitely wont recommend, or if you use them, don't be stupid like me and pay in full upfront (so much for being a trusting customer)