Time changes that inconveniences passengers

I am so irritated by British airways comair, i made my booking in April for October from JHB to Cape town all along they would send emails changing my flights at first i did not mind as the times where close to my initial booked time. Now within 72hours before check in they change times again to an early time flight from 9h45 to 6am, its such a huge inconvenience i am travelling with kids. i tried calling their call centre wasted 40 minutes on hold no help let alone speaking an agent what is that.

Now how am i supposed to get the airport so early extra unnecessary expense, when we get to cape town so early what must we be doing because our accommodation check in is late.

I really feel it is unfair i booked my flights early to avoid being inconvenienced but this is just unfair and unprofessional.