It is doubtful that a court will void your adoption. Because you obtained your immigration status through your adoptive parents, you cannot file an immigration petition for your biological parents. There is a specific regulation on that issue.
Perhaps there are other ways that you can help your family in Haiti.
Best of Luck
To add to the last answer it appears that you were allowed to immigrate based on the adoption. I would certainly consult with an immigration attorney about how to proceed or if you should proceed. Best of lusk to you.
This information is provided as a public service to provide a general answer and should not be relied upon as legal advice.