I don't think anything is drastically wrong with the plane. The Slow Stick is a very forgiving design, and can be flown successfully and easily even if the wing is slightly warped, or if things aren't perfectly aligned.

There are little sliders below and to the right of the elevator/rudder control stick. These are called trim tabs. You slide these to "trim" the plane for straight and level flight. If the plane is turning left, you slide the trim tab underneath the control stick to the right until the plane flies straight. Just move the trim tab over a click at a time until the plane stops turning left.

The wing is made out of "meat tray" style foam, so you can form the warp out of the wing if it bothers you. Twist the wing to straighten it, then blast it with your hair dryer. If it doesn't quite straighten out, twist it a little more. However, you should be able to trim the left turn out. Don't worry if the control surfaces aren't perfectly straight.