Oh Jade
You seem to me, through all the posts you've shared with us about this, to have done (and continue to be doing so) your very best in a job that requires at least another half person's input for some or whole of a week.
Ultimatums of the kind you've been given don't sound helpful - is the world going to come to an end if you don't meet tomorrow's deadline? Is anybody going to starve? You haven't said so, so I think the answer has to be 'no'.
To set the ultimatum is one thing. To then 'add' to that by dumping 4 days' worth of work on the day before the ultimatum falls due says everything.
Your direct sales business, as you said, is booming - at the moment. And the out of the blue calls about other jobs is sending a very clear message.
So if and when you resign tomorrow, do it with your head held high and don't fall out with them. Remember you're a professional and whatever boiling point you've reached inside, don't show it!
All the very best - we know you'll come back and tell us what happens!
Jackie
www.secretarialsummit.com
Peer Moderator 
