Poor customer care and communication with delayed flights

15 June 2019 BA6428 was suppose to leave at 06:40 am from Cape Town to OR Tambo. It is now 12 hours later as I'm writing this and my elderly parents are still waiting for a flight! This is not the type of service or customer care I expect from this international brand. We especially pay the higher price for excellent service and this is certainly not it. There was no SMS sent out alerting us that the flights are delayed even though they knew they had a backlog from the night before. There is no communication and no staff in the terminals checking on waiting passengers. Surely they could have put waiting passengers on outgoing flights that were not full even if that meant them flying with other carriers. I am disappointed and utterly enraged that my parents have to suffer this discomfort. Make a plan BA.