More than two months to complete house slap

It is now more than two months since they started doing my slab and to date it is still not completed. The workers are brought to my site at night majority of the time and they work for about 2 hours then they gone. At times being that they work at night they make mistakes which have to be rectified thus more time wasted. My job is not priority as they work at other areas and get to my house early evening to work night time. Other days they do not show up at all. The scaffolding that is used is borrowed and the owner is annoyed with the time we have had it and now wants it back. I was promised that my job will take first priority as I had been waiting since June but instead it is taking last priority hence they only get to my site at night. One must beg and ask over and over again for them to work. Every other day i have to drive past the site to see progress and the amount of petrol spend thus far is ridiculous not to mention the kilometers on my vehicle. I am disappointed more with them getting to work for less than 3 hours a day 95% of the time as they working at other places and they do bits and pieces. By now I odd to be doing the next slap with nothing to show. SAD.