Disgusting customer service

I had booked a flight to Johannesburg from King Shaka airport with Khulula for Monday the 21st of May unfortunately I had lost my 9 year old son that 20th and I had to drive up to Johannesburg during my awe deal It had not crossed my mind that I must call the airlines. So today the 1st of June I went to the customer service desk to seek assistance I did not want a reimbur*****t but just to change the date I was told that it could not be done, I had asked for a manager and was told she/he was on a call and could not consult with us being a customer service manager myself I can tell you this is utter disrespect for the client/customer. We were then given a number to call the call center we had spoken to a lady by the name of Chantal who was more than willing to assist to top of my frustration I had gone to Safair with whom I had two bookings that I'd missed for above mentioned reason and I had not one but 4 consultants assist me and have my flights changed. Word of mouth is the best form of advertising and I can safely tell the world that Khulula airways have zero customer s****s.