Aerobird Extreme isn't from Walmart, I can assure you of that.
Anyway, maybe it was the classic V-tail dive, spirals in after a sharp turn? Or perhaps it was radio interference? or maybe a faulty battery? I heard somewhere that CB radio can affect the 27mhz channels, not quite sure about this however. So it could be many different things. I agree, stay in the hobby, find an instructor, because that really helps, having support is the MOST important thing you can do to help your flying. Also something that might help, you can try downloading FMS flight simulator, or another free simulator. Although very doubtful it will impress you graphically and physics wise
, it will improve your control ability.
Sorry about your plane though!