Remember you have paid for this machine already. Hope you used a credit card (even if you want to pay cash, pay with credit card and then pay off your bill). I would not let this go on too long without getting a firm committment of delivery time, even if you have to get a number from the dealer call the company directly. Someone has your money and is earning interest on it while you are without a machine and the money.
Sorry, the older I get the more cynical I become about things.