WOW- If you are going to make the claims you might as well back them up.
1- How off was GC Fwd/Rear Did you balance the model right side up or upside down.
2- What did you do to calculate the correct CG.
3- Did you fly it with the new CG / If not how do you know it is correct?

Just thoughts- But my guess is your model came out tail heavy (as many fiberglass models do) and you crashed it on takeoff. There are way to many places that you could have made mistakes before your first flight. And threating a foreign company with a lawsuit is not the right way to get things done-

Also are you able to prove that every model of the type you purchased is defective? Do you plan a class action lawsuit on behalf of everyone who has purchased a model from CMP.