Existing Booking incorrect name

I have made a booking online for myself, my 4 year old son and my nanny. However when I checked the booking confirmation, I saw that my first name is twice, so there are 2 passengers with the same names and surnames but with different ages. Now Mango refuse to update my booking with my son's first name without me paying R280. <br> <br> I guess this is how they make their money on their \happy days"Sales. it is pathetic"