Horrible booking experience

Booked a flight through Kulula for BA. Horrible experience when i tried checking in online. BA had NONE of my details, I couldn't check in online. I phoned BA, they transferred me to numerous people. They dint recognise the booking reference. Eventually they transferred me to Kulula who said I need to speak to BA!!! Phoned again, got transferred. Eventually after an hour, someone at BA helped. I had to give all my details as nothing was on their system. Will NEVER use Kulula again to book intentional flights.