Complaint Airlink *******

I purchased a ticket for my trip in April 2024. The ticket was R957. I wanted to change my return flight to the 3rd of December instead of the the 29th of November. The airline could make the changes but I must pay R1140. How can the changes cost me more than the initial ticket. SAA changed my other ticket at a cost of R55. This is a *******. The consultant was also very unhelpful and condescending. Our company we use Airlink a lot however this left a very bad taste to me. I will never every buy their tickets. They said my ticket cannot bet cancelled because its the cheapest they offer.