No feedback or response!

I have been trying to get some feedback from SAA regarding a complaint but there has been no response. An e mail was sent to the customer care but I have not received any response. When you call the call centre ( I have done this twice and held on for half an hour on both occasions) no one answers the phone and an automated voice tells you to e mail the customer care centre. How do we get any feedback from SAA if we cannot get a hold of them????