I've never had a fraudulent charge on my Amex. I'm talking about "disputes", like, "you wouldn't let me get on the next flight out after you canceled my previous flight out, so I bought a full-fare coach ticket to get the fuck out of town and then charged it back to you". That has worked for me with Amex, and so they have me for life.
I've screwed over an airline that didn't keep its promise to fly me somewhere on the date/time agreed on. And yet somehow I sleep just fine at night. Odd, isn't it?
I hate to be this guy but you violated a contract that you agreed to. If you weren't happy with their refund policy you shouldn't have bought their ticket.