Aluminium shutters - worst contractor ever used.

Nathan Marais has to be the worst contractor I have ever had the misfortune to deal with. Quoted for aluminium shutters on my new built house. Showed me photo's of previous jobs. Went around and checked his work premises - all seemed legit. Quoted in August, with a promise to be finished by first week of September. The job is still unfinished - many promises 'coming tomorrow and won't leave till the job is done!'... His workers freely admit they have never done a job like this. He doesn't answer his phone, does not respond to emails or sms's. The shutters that he has kind-of finished don't open, the rest are not finished and don't work. No threats have worked, no begging has helped. Avoid this man as if your life depends on it!