Not impressed with SweepStar

Not impressed with Sweepstar! Their booking system is efficient and easy, but contacting them afterwards to make changes not so much. After no answer on their phone line and an email that was only answered the next day we landed up with a R135 penalty per person booked and also lose our discount voucher because they don't give the option to change a booking, but only to cancel - and you can only cancel without penalty if it's done before 12pm. Apparently 1pm is too late! Not only does it impact me, but the ladies I booked are also negatively affected by their policy because nobody else could book them either. This was my first time using SweepStar, but will unfortunately be the last.