Sorry, the additional information was not yet showing for me while I was typing my answer.
The short-term concern: Yes, you must respond to the subpoena, including filling out the questionnaire.
Your BK attorney should have clearly explained that debts arising from a breach of fiduciary duty are NOT dischargeable in a Chapter 7.
You did NOT receive a discharge of the debt in BK, so referring to that fact is irrelevant. It won't help. What you need to do now is get very familiar with New York's scheme of what property and income is exempt from execution, so you can properly invoke those protections.
"I wrote to the judge, and the plaintiff's attorney's that because of their error, I did not have time to even consult with an attorney, and if the case could be postponed for 30 days. No response came back." That is a great example of why there are laws against people practicing law without a license. The proper and effective way to get what you asked for would have been through a motion to quash service and a motion to continue the proceedings, in compliance with NY law and court rules. If someone had charged you money to write those letters with the obvious goal of getting things delayed until you could get an attorney, they would have given you bad advice and provided no services of value either. Study at the local law library would have been your friend.
The fiduciary element underlying the debt is troublesome, because the ultimate "super discharge" under Chapter 13 might be successfully challenged by the creditor by proving that the debt arose from fiduciary fraud. However, keeping payments to what can be afforded under current income, instead of getting whacked by the full amount allowable under NY state wage garnishment
, might still make a Ch 13 sensible.
To know for sure, you would need a full-blown consultation with a BK attorney.