Fed up with Kulula

I fly at least six times a year and with Kulula as we have vitality. EVERY time in the past they were delayed. Now AGAIN we are on time waiting in the cue to board just to receive an sms informing us that we are delayed for 2 hours. Why could the sms not be sent when we were still at home or before we went through the gates????!!! Every time we have to change our arrangements due to Kulula being delayed. This is really unacceptable