BAD SERVICE FROM KALULA

i have a travel bank voucher due to a canceled flight due to covert voucher number *** one has to be a rocket scientist to work this out both coming to cape town and now trying to book to go to or tambo had to call the call centre they could not help with the website so they said they would book the flight for me. However the cost of the the flight according to the agent is R 500 more than what i have on the website This booked through discovery. The agent has now put me on hold because she does know how to handle the discovery discount What a disgrace and waste of my time