Abene777, I'd tell you to try to relax with this. If you go on, when you finally get a properly working Stage, in a short time you'll forget about that horrible experience.
I had a problem with the Tap Tempo function until I was explained the way it works (not the same way that every other gear I've had). It took like 2 months and some confusing info until the man himself explained it to me. Now I'm very happy.
I understand your frustration but, hey, things not always go the way we'd like. Give them another chance, because, at the end, you'll be very satisfied.