Level3 - have they alive abuse team?

Hello! I am an owner of the small telecom business in Eastern Europe. We have the provider independent network and own autonomous system number. Due to the financial crisis impact, we was off-line for some time. Now it is possible to return to business. But I found our network is already announced by Level3!!! I have dropped them a letter to abuse@level3.com, then got an auto-answer from the robot, after several days have repeat it... Level3 keep silence, and our network is announced now by /24 pieces! What is the good way to push these network hijackers more efficiently? ______________________________ Я пользуюсь почтой на Мете http://webmail.meta.ua