Surely it is up to yourself to inform the booking department of your company that your real first name is the one they should be using.
You state you only use it on official documents, does an Airline ticket not count as an official document anymore?
My great Uncle was known by his middle name all his life but wouldn't put that as his first name on the ticket on one of his monthly trips to either the USA or Spain. The name simply wouldn't have matched his passport, which is what the airline specifically ask for. There are plenty of reasons why they want your first name on the ticket, so you should, rightly, be charged to change it if the airline demand that you do.
As with most fees or charges, it is there to act as a penalty for when you don't do something the airline specifically asked you to do. You can try and accuse an airline of bribery, but at the end of the day you just simply have to put your first name as your first name and nothing else!