Del Windows & Doors

i had ordered windows with a expected delivery date and called to confirm the delivery and was told the windows would be an additional 10 days. My contractors based their work schedule on that date. When I was informed of the delay, I wanted to cancel but they advised that glass was already pre-cut?? I have been advised from other manufacturers that standard practice is that the glass is not cut until they do job...I feel like they are holding us hostage on their time schedule. Absolutely ridiculous and very poor customer service. Save yourself the heartache and buy your windows elsewhere.