Sydney Sunrise Windows & Doors Pty Ltd

I purchased aluminum windows and doors for a new house from them. In the first two times of deliveries, missing items and parts happened every time. Before the last delivery, I check with them for a quote for installation. They quoted $11k for installation (24 windows small and big, and 3 external doors, price less than $25k), which includes $2k for installing a 5 panel foldable door only. The installation could be done in 2 days by 2 workers according to their estimation. I felt it’s too expensive, but Nancy boasted that they easily charge builders 20k to 30k for installation. I refused to accept their installation quote and ask them to deliver the left items. Because I need my installer to check and confirm that all parts are delivered and installable, I speak with them to hold the last 10% payment until the confirmation is done. Then they refused to deliver the items I had paid for and ask for final payment before delivery. Very bad experience with them.