If I pay you $1.99 for something that I don't even know that I'm getting (as your description is incredibly vague), then I absolutely have every right to voice my opinion about it via a review. That's the beauty of IOS and the internet, and that's the risk you take by charging for your app.
You have a choice of how you want to respond to negativity and how you want to portray yourself to your customers. You've clearly make a decision on how you want to do that.
I also made it pretty clear that I made my decision on your response to the review, not the review itself, and your response here certainly hasn't swayed my opinion.
Good luck with your app, but I'd never pay you a single penny.