Delayed flight

Flight BA6418 was delayed and this is unacceptable. How was I supposed to arrange transport at 23.30 in Johannesburg. I am a female and you have jeopardized my safety. This is not acceptable. You need to consider this when changing flights. Why don't follow FLY SAFAIR... I FLY ALLOT and because they had no availability I had to use you. This is a regular thing as 4 flights were rescheduled while I flew from Durban last week Friday!