Website booking gone wrong

I had choose to fly from Dbn to Jhb on 17/06/2015 on the 15:05 flight. For some reason the booking could not be processed. I clicked on \pay"again for the booking and the time of the booking changed to 12:10. This is not acceptable. When i had clearly double checked the times. The system automatically changed it. Please action asap. Because this is not the time i want to fly.<br> <br> Regards"""