Air ticket changes

Just putting this out there about Kulula.com where I booked a ticket for June for my daughter, 5 months away, and now the wedding planner messes up and the wedding is a week before the date of the booked ticket. When I ask Norma of Kulula call centre for a flight / name change, one week exactly before the booked dates, 5 months in advance, the cost is the same as a new ticket. For me this is ***** and theft, cos if I book and pay again for a week earlier, they resell that ticket I paid for a week later, and they okay with that. Not half price, sommer full ticket price again, so if an emergency occurs, like this, you get *****ed. I know most airlines probably do the same and do this cos its standard practice, BUT IS IT FAIR??? ... On top of that she had to pay British airways a further GBP 150.80 for her date change. That is messed up folks. Go Kulula.com ...makes me sick how they do this with impunity and nothing we can do. Just Pay...