Damaged Windscreen during routine service

Last Monday I took my I20 for a service. During the pre-admission check they marked down any existing marked/damaged areas on the body of the car. I agreed with these and signed acknowledgement. I then received an SMS stating the car was available at 16h20, and waitedat least until twenty minutes.My wife had been waiting since 16h00 at her employ for me to fetch her. Eventually I received my car and rushed off to fetch her. As soon as she got into the car she noticed a crack in the windscreen (about 8cm) i on passenger side and because of the time, called Ryno immediately from the car advising him of the issue. We took the car back on Wednesday and since have been given the run around. In a telephone call with Ryno, last week he laughed at when I ask if I had to pay. He then said they will replace the windscreen. ON Friday 27 they requested photos which we provided. This morning I received an email stating that they WILL NOT be replacing the windscreen and it is for my own expense. The crack has grown progressively worse. I am really ****ed off with the treatment received by HYundai Bellville