Poor customer service

It’s Friday 18/10/2019 British airways flight BA6213 for 21:00 JNB - DBN that should be boarding at 20:30 it’s 21:10 and we are still on the ground, boarding has not taken place what’s frustrating is there was no communication from the airline that there are delays no representative at the counter to advise why we are waiting. This is poor service and British airways has shown no respect for the travelers , it is becoming a habit that weekend flights are delayed and no one can account as to why instead we get attitude from the staff members. So if you were in a rush for a meeting or dinner date it’s non of their business. It is appalling that even when we are now boarding nothing is being said about the delay or if they apologize for the inconvenience . I will never use this airline even if it was free this is ridiculous cause if you are late for your flight they are very quick to tell you to wait for a stand by flight so if we are delayed now for the 21:00 flight what more for the other travelers that are meant to be boarding now at 21:30 and we only leave at 21:18