The attorney who assisted you in withdrawing your plea or the appeal would be in a better position to refer you to an attorney if he thought you had a case, but it doesn't sound like you do. Again, judges have immunity from these kinds of lawsuits.
The information provided in this answer does not create an attorney-client relationship and is not considered to be legal advice.
You can't be sentence for a crime unless you have been found guilty or pled guilty (or non contendere), so if you wer at a sentencing hearing, legally you were guilty. A motion to recuse is determined byt the judge you are asking to be recused in most circumstances. Did you make a motion to recuse? I'm not sure in what way you think he violated your constitutional rights.