[GaGlock01]

I have stated a new job and it was going will up to this last week.

I was offered a promotion, but not more pay. It comes with longer hours, and has overnight hours. I get paid for travel time, I get a company van, and get a company credit card to buy gas and supplies.
I would be the manager in charge of a buildouts. When you do build outs sometimes you can only do the work when the other places are closed, so you don't disturb people during business hours.

My problem is I do not want the position, I never expressed any interest in it, but it is a bigger position with the company, I am shocked that more pay is not a part of the job, but even if there was more money, I still would not want it. I do not want to work all different kinds of shifts as needed to meet the demand of the position.
I rather work from 6 am till 5 pm,with higher pay after 5 pm, and on call on the weekends, easy and stable.

I said to my boss that I did not think I was a good fit forthe position, meaning to be able to handle the demand of the position and he went off the wall.

I never seen anyone get so upset at saying they were not able to handle the demand of the job, or to turn down a position.
He then threatened my job and said, if you don't take the move your fired.
The promotion offer was in a company email, my rejection email turning down job was sent to him over the company email, and his off the wall reply was sent to me over the company email.
How would you respond back?