Worst Airline!!

My wife booked tickets to Lagos, Nigeria. Since she has left she has been delayed. She was delayed in Cape Town by a few hours. When getting to Luanda, she was delayed by a complete day. She missed the first and most important day of her conference. She was supposed to fly out of Lagos on Friday. Guess what, delayed again. She has only just arrived in Luanda and .. CAN YOU BELIEVE IT, told that she will now only be flying to Cape Town tomorrow. HOW IS THIS POSSIBLE??? and there is no consideration for her or the other passengers. All their baggage is still with the airline. My wife has been in the same clothes since Thursday!!! THis is by far the worst airline I HAVE EVER HAD THE DISPLEASURE OF DEALING WITH!!! and most of the time, the contact numbers dont work either!!