When you bought it four weeks ago, you said they were ordering it.
What date of arrival did you get from them at that time?
Did you pay all your $$ upfront?
Many shops don't carry an inventory on high end machines, so waiting is the norm. Each will have different parameters around that re the delivery.
I'm sure you are anxious to get your new machine but whatever you agreed to when you purchased it, is what you have to wait out first, before you can say much.