Bad service and they wanted me for the job that's not done yet the problem is not done

I went to one of their outlet to get my rear window fitted they were about to close and I suggested to go back to them the following day. Immediately they told me that they were not bust the whole day meaning they are ready to help me They started to do their job , while they were busy they started to argue about their job..I realize that all of them are drunk . They asked me to go without them finishing the job. They asked me to come back after a day then I went ,when I get there the master mind was not there Saturday,Monday the job was not done , then Wednesday the job was done , and they cracked my rear windscreen, to cut the long story short , They bought the new one ,on Friday the job was done that was 7 days .. But the problem is no fixed..I have paid for nothing.. When i look to what they were doing.. I can fit the glass better than them . That's bad .