Bad Customer Service from Mango Airlines

I booked tickets worth R12480.70 on Mango Airlines for my boss and colleagues on the 21st June 2018.

I usually book online for my company and have been doing this for about 2 years now so our company has been spending a great deal of money with mango as my boss and colleagues travel between cape town and JHB almost every month.

On the 30 June 2018 I needed to move 1 of the guests which was already booked on the a flight for July to a flight in August before putting through the payment everything was checked as I usually do and everything seemed fine however when receiving the confirmation it split the incorrect guest which was not supposed to be split and to reverse this error an amount of R912.10 + R292.51 was paid.

I then sent an email to refunds and was told point blank that they would not be refunding me; this is unacceptable service for the amount of money which we spend each year. I expect a better quality of customer service from what I though was a reputable company.