You may very well be right: maybe they're ripping you off and maybe the ToS are unenforceable.
What I'm saying: adjucating these situations is the purview of a justice system (ie courts). If you were ripped off, you can always go after the party that caused damages (ticket issuer). If you want a "short cut" to "justice" provided by a credit card processor, well then they get to decide when & how -- and I don't think it's unreasonable for them to collect "evidence" from both parties to make more-informed decisions. And again, if you dislike their rulings you always have small claims court at your disposal.
The goods were not delivered and the vendor kept their money anyway. How is this okay?