Travelling with Khulula Airlines

I recently made a booking through travel start and the day before wanted to book my seats but could not find my booking reference. So i called Khulula airlines at Lanseria and asked them to check. The lady on the other end of the line was cold and unhelpful...all she said was she could not help me as the booking was made through travelstart! If the flight was a day before should not the company have details of people travelling with them. Call centers are pathetic for help as this has happened on numerous times with no help from them!!!