Disappointing service from Mango Airlines

I have flown with Mango airlines many times and have had no issues with their service in the past however I am extremely disappointed with the level of service that I have received from Mango airlines today. I attempted to book a flight from Durban to Lanseria for approximately R387 at 06h15 on 25 A at approximately 07h00 this morning and was unsuccessful. The website was unable to process the payment. Everything was done except that the payment was not being processed. I even attempted to use another credit card and was still unsuccessful. I called Mango airlines around 08h30 to see if I could book the flight telephonically and was on hold for almost 30 minutes when the call was dropped. I had to call back and wait a further 20 minutes for the call to be answered. By this time, my online session had timed out. I spoke to an agent that told me that the website was down and that there was nothing that they could do at the the time and I must try again in an hour. After a while I was able to get back online and by that time the cost of the flight had changed to R490. I called back and waited another 20 minutes to speak to an agent (named Sabelo) that told me that he could not help me and had to transfer me to customer services which he dad, after being on hold for approximately another 15 minutes, I was assisted by a agent by the name of Siya. I informed her of what had transpired and that I was not willing to pay the new price as it is not my fault that Mango was offline. Siya took down all my details and advised that she would call me back however I have not received a call back yet. The website is back online as I have attempted to go online just a few minutes ago. The same flight is now approximately R650. I am unable to make any travel arrangements until Mango airlines gets back to me. This is absolutely unacceptable and needs to be addressed immediately.