Absolutely. Or indeed he could have got anyone else to email you. And it's not like he has been in a coma, he could have found five minutes to sit there and send a quick email, especially at the start when he had flu like symptoms. I would look after yourself and ask for a partial refund, as a goodwill gesture, until the work is completed. Either that or cut your losses altogether, cancel the job outrightand get all your money back. Even if this is true, you owe him nothing and he should have made proper provisions for his business (and indeed his job) in the event of illness and this just means he is very unreliable. Best of lcuk whatever you decide to do.