1. You need an attny. At least meet with a few - consultations are free - but you may be hard pressed to find one familiar with handling involuntary proceedings. Try higher-end firms even if you have to pay a few bucks for the consultation.
2. You need to answer petitioning complaint to preserve your rights if this is an improper filing.
3. If you have 12 or more creditors the involuntary needed to be submitted by 3 of those creditors, not just 1. And. . . those creditors had to hold claims that are non-contingent and NOT in "bonafide dispute". If you have less than 12 creditor then 1 creditor can seek the involuntary but I beleive that one creditor's claim cannot be in bonafide dispute.
4. Since you have some legal background (AJ is right - a little knowledge is dangerous), you want to carefully read 11 U.S.C. 303.
5. For all we know, you are a candidate for a bk and, while the initial filing was involuntary, maybe you personally need one - but not the Chapter 7. Conversion to a 13 or 11 may be the path you choose.
Best of luck.
Des.