Get a batch of the right size spokes and have someone rebuild the wheel(s). Chances are they weren't built/tuned all that well in the first place (it's doubtful that the building mechanic took the time to tension each spoke just right). As far as the bike not being "reliable," well, parts wear and maintenance needs to be performed. That's just the way it is. Honestly, your post could have been about nearly any bike out there. You may as well be asking if you should buy a new bike because you got a flat, IMHO.