RwandAir - How can you still exist?!?!?!?!?

RwandAir is the worst airline in history. My friend and I have been messed around so much with our flight going to Uganda and again going back to Johannesburg. They change flights as and when they feel without any adequate notice. RwandAir has zero remorse or people's time. Appalling service...I am sick to my stomach and mad as all hell!