Mango is the worst Airline ever!! No Customer Service!!!

On the 13th October we arrived at OR Tambo to catch our 8:35am flight only to be advised that our flight had been cancelled. The lady at the Mango counter advised us, after checking her system, that no notification was sent to us regarding the cancellation. We subsequently booked on FlySaAir. I contacted Mango and they advised that i cannot speak to anybody and that i must send an email to ***. I did this on the day of the flight, plus i sent it again on the 19 October and 27th October. I have yet to have a reply or even an acknowledgement of my request for refund. I then spoke to Bontle Mokone (Call Centre Team leader: Johannesburg) on the 27th Oct and she promised that she would resolve my refund. Again, i have not had any communication or update on my refund request. I do not want a voucher. I want my refund back. This is the worst customer service i have ever experienced. No Feedback and no passion for client service. Regards Christopher Steyn ***