Andrew Smith refuse to communicate and refund course money after postponing with no new date

I paid via Pay Fast for a 2 day course with Andrew Smith . The event would have taken place on the 22nd & 23rd June at Centurion Country Club Conference Center which is located on John Vorster Avenue in Centurion. It would have started at 9:00am sharp and until about 6:00pm. On the 13th of June I received a Whatsapp stating the course has been postponed. Since then I have not had information about the postponement and I have sent communication via Facebook, Facebook Messenger, Whatsapp, Email and via Phone call. On the 2nd of July he asked what bank I am with and then blocked me on Facebook and does not take any calls from me, reads my Whatsapps and does not respond. I want my money refunded as I am no longer interested in attending any courses presented by him or his company.