Hey man, I can't tell you what you should do or how you should feel, but the idea of someone "leaving" pinball because of someone else really bums me out. Maybe a week from now you'll have your money and a new outlook on things. Maybe a week from now you'll find out that you're not getting your money back and you'll feel worse about the situation. Either way, the positive sides of pinball should be able to buffer the feelings from this one poor experience.
I've had a few experiences in pinball that really, really bummed me out. It took a while, but the highs I've experienced from pinball have more than made up for the lows. Over time, I promise you, there will be more highs than lows.
If you choose to step back, I hope you come back to find pinball in a better spot for you than it is today.