Worst rental agency in history!!!

If I could give -10 stars that would be roughly in line with my feeling about this company. My sister paid her deposit in June, we are now in August. They keep coming up with a bullsh*t story of the owner not wanting to give the keys so that she can move in. The owner is ill and in hospital and they are expecting her to rent AirBnB untill he gets better, if he even makes it. On a Sunday night, after promising her the keys at 5pm today, they cancel again. Leaving her on the street with 2 kids. They are inhuman and could not care less. My sister does not know what to do, as she is speaking the the owner of the Helderberg branch, and he is shrugging his shoulders, saying it is out of his hands.