Zero customer service Air France

I have booked a visit to my daughter in November. I want to change the return leg of my journey. Now this should be an easy thing to do yes ? WRONG. Goto to the Airfrance website https://wwws.airfrance.co.za/. The one thing you will notice is that there is NOT a single telephone no anywhere on the website. You cannot phone anyone. On the website when I try to change my return jpurney it says I should contact customer service and they will do this for me. Now I have spent hours on this website and CANNOT find a number or anyway whaysoever to contact the alleged customer service. If I did not know any better I would have started to think it was a ********** website. I cannot even find an email address.