There is no way. But visit www.mig33.com and login using your user id and password. And view the call details. See if that helps. I have never received any calls so can't assure you. But give it a try. And try mailing your complain to
contacts@mig33.com or fill up the form provided in the site with your problem. They are very prompt and usually reply within 2 days max.
And alsiladka - Nice solution man. But what if he gets more balance?????? or use another id.