Same thing with me, same excuses, it's no coincidence that level up's reputation is VERY blurry.
EDIT: I've searched a friend of mine that is a lawyer he said that the first thing to do is to contact the comsumer protection organ (PROCON) and explain the situation, probably this should solve this issue, if not there's the possibility to sue Level up games under the "law of obligation" (Lei da obrigação de fazer) since the company is responsible and have the duty to sell the game expansion.