Mango Airlines never ever again!!!!!

I booked a flight on the 13th of February to return from Johannesburg to Cape Town on the 14th of March 15h00 in the afternoon. My children made a booking on Kulula.com for 14.50 to Cape Town, also from OR Tambo. We were in Johannesburg for a birthday party. We arranged the flights close together in order for the person who picks us up as we are living in Somerset West. Saturday night I wanted to check myself in the Mango flight, just to get an error which said the flight has been moved to 19.05 the evening! I was never notified nor messaged. I had to buy a new ticket on Kulula.com in order to arrive at the same time as my children in Cape Town to get the lift back to Somerset West. I sent an email to Mango and insisted that they refund my flight as I was not notified of the change and could not make alternative arrangements. I have not heard back from them except that they are inundated with emails! No wonder! This was the second time that I had this experience with them. In 2019 I had to return from OR Tambo on a 15h00 flight to Cape Town. On my way to the airport I received a sms to say the flight had been postponed to 18h00 that evening! I went to the guy in charge and after I was in tears he put me on the flight which was boarding at that stage. This is really unacceptable that they just do what they want to! No message to ask if it suits me to change my flight to a different time!!! This time I really am insisting on getting my R599 back as the new ticket cost me R1054.