From what you are saying it seems like Blizzard weren't acting in good faith.
Forums tend to vilify companies more than necessary.
If you feel you have been misled into buying something you didn't want by all means present your case to them and ask for a refund. Then take that money and use it for some Kickstarter or indie.
As far as I'm concerned you I think they are pretty transparent with their products, you just have to learn to sift through the corporate lingo.