Infant charges...what?

So I changed two bookings I had for my business colleague and myself into tickets for my family (our business trip got cancelled) into my wife's name and my own.<br> <br> Wishing to add our two children, under the age of 2 years old, I got told you would just show up at the airport and all will be in order. In the back of my mind not feeling at ease with that I phoned Mango airlines again today and got told yes you can either do it at the airport or through the call center but now there are costs involved...as follows:<br> <br> Each infant charged R255.00 airport tax and charges for one way, so this means for 2 kids I need to cough up R1020 + there is also an admin fee applicable of R360. So just to add my two children with us on the flight to Cape town I now have to pay an extra R1400.00. <br> <br> The best thing is there is no manager available to speak to, just the one lady at the call center, so nothing can be confirmed by a supervisor or give me any assistance with this.<br> <br> I actually find this very negative as I used to be and probably will still be a supporter of Mango Airlines, but I am not sure how loyal I will be.