No delivery of goods as per schedule and refusal to refund

I purchased Aluminum doors and windows at Aluminium experts. I paid the 50% deposit. They came to do measurements and inducated the rest of measurements will be made when screeds on floors are in. Towards the end of November 2017, I went to see DuToit at their factory. I was with my wife and my builder. We explained to him that we need all the windows installed before end of this year. He did not promise anything, but did not say it will not be done. The House was ready for measurements on the 24 of November 2017. We were then given a delivery date of the 14th of December 2017. On the 6th of December my wife went to see him again, and he indicated that he is pushing to finish on the 13th but would rather stick to the date of the 14th. But on th 12th of December he sent an email that he can only do the installation after the 15 of January 2018. Keep in mind that I told him on the 23 or Nov that we don’t have a place to stay until they put the windows and doors in. I called him on the 13 of Dec 2017, I could of eat hold of him. He called me back the same date at 13:01, he was with the owner of the company. They reiterated that they cant help me, neither can they give me money back. I indicated that I need the money back so that I can get someone else to deliver the goods that they are unable to deliver. I’m sitting now with no money and no products.