Worst Customer Service ever!

Worst Customer Service ever! I booked a special deal on-line on 03 April, Johannesburg OR Tambo. On 20 April I sent a query to the Information desk, I needed to change my booking. I heard nothing from then until 2nd of May, when two staff members forwarded my query to the Reservations desk and asked them to reply to my query. After two days, still nothing. I wrote them a rather strong email about their lack of service, still no reaction. Today, I cancelled the booking, stating in the email that I would rather pay 5 times the price for a reputable service provider. I simply received an email confirming the cancellation - no other response, no sorry, nothing! Now, reading other people's reviews, I am SOOO glad I cancelled, as I will be transporting overseas visitors during this time. At least I now have a confirmed booking with a reputable car hire service provider, thank goodness!