Contact the court a copy of the transcript of the court hearing on the motion. The transcript will state what was said on the record. If there was no hearing and thus no transcript, usually the court record will reflect the reason for the dismissal. Contact the court.
The information provided herein is general information only and not legal advice. The information provided herein does not create an attorney client relationship and is not a substitute for having a consultation with an attorney. It is important to have a consultation with an attorney as the information provided in this forum is limited and cannot possibly cover all potential issues in a given situation.
I am not surprised the attorney will not respond -- the case is over. If you want to re-open it, you will need to move quickly, but your odds are slim to none. There must have been one or more missed court dates, which judges do not appreciate. Your best bet to find out the reason for the dismissal is making the trip to the courthouse to get copies of the records.
I hope that this answer helps you in a general sense, but it does not constitute legal advice, nor tax advice of any kind, and does not create an attorney-client relationship between you and myself or my firm.