Failure to have a back up plan for customer Kulala your service disappoints

Booked a flight with Kulala for my mum from King shaka durban to or tambo jhb. Flight was scheduled to depart at 22:15. It's now 23:04 and the flight has not left. I have made numerous calls to the desk to check on the status of the flight as my mum has been waiting since 21:15. There where no messages or calls to advise passengers that flights were delayed when I initially called they advised that flight is delayed and would depart at 23:00 another call to check up on them as my mum is alone at the airport and was advised that it would be delayed and only leaving at 12 due to a backlog during the course of the day.

An entire day has passed and Kulala knew about a back log which evidently delayed all other flights but no customer communication to ensure their passengers are taken care off and make the necessary arrangements. It is not only an inconvenience of time for passengers and individuals taking or picking them up from the airport safety of the passenger is surely compromised. Kulala however clearly not interested in the safety and satisfaction of the travellers utilising their service. As an airline that deals which a number of flights there should always be a back up plan in the event that something should go wrong to take care of backlogs and ensure that travellers are taken care off considering that slow lounges are not an option at this time. No consideration has been given to and optimal and effective process resulting in a very unsatisfied service and customer.