Complaint

My name is Mrs Adams made a booking for husband Mr A Adams and daughter MS L Adams for the 4th with ref: QZLNOL to fly from George to Johannesburg and accidentally make a booking for 5th July from George to Johannesburg and paid for both, thinking that I cancelled the booking for the 4th July after discovering my mistake I called Mango Airlines for a refund a call centre agent named Nondi who is very unprofessional and not helpful at all assisted me, she advised me that I cannot be refunded but can change the ticket for another day or do a name change, I ask her until when do I have to make such a change before forfeiting my money she advised I have until 30minutes before take off, I called her back before 12:00 as take off from George is 14:20, to make the name and route change on which she now she advise me in order to make the route and name change i'll have to pay an additional amount which is almost R2000.00, I am so disappointed in the service Mango Airlines provide in terms of Customer Service because over and above the money I paid for the tickets I know have to pay an additional amount or forfeit every cent I paid for the ticket, i've been trying to get hold of a manger for assist to no avail, I called for the 3rd still being told there's no manager to assist me meaning that I won't be getting any assistance until take off and then forfeit my money. this is such a sad situation as I now will forfeit my money as a result of poor customer service form Mango Airline,