There are no guaranteed results in family law, especially if you are seeking a parenting plan modification, which are disfavored. However, the conduct you report sounds serious enough to consider seeking only supervised residential time for the father, and sole decision-making for you.
If you choose to litigate, I believe that seeking a parenting evaluation, a DV evaluation, or appointment of a guardian ad litem in a temporary order may be looked on favorably by the court. Any of them would inject a neutral, independent third party to help the court weigh the parties' conflicting tales.
I recommend you confer with an experienced family law attorney in your area regarding your next move. The way I see it, it's either dispute resolution as provided in your parenting plan, modification, and/or contempt. I'd have to see your actual Final Orders to determine the best course of action.
DISCLAIMER: This answer is provided for general educational purposes only. By using or participating in this site you agree and understand that there is no attorney client relationship between you and the attorney responding, and no attorney-client confidentiality. The law changes frequently, and varies from jurisdiction to jurisdiction. The information provided in this answer is general in nature and may not apply to the factual circumstances described in your question. The applicable law and the appropriate answer may be different in the State or States where the relevant facts occurred. For a definitive answer you should seek legal advice from an attorney who (1) is licensed to practice in the state which has jurisdiction; (2) has experience in the area of law you are asking about, and (3) has been retained as your attorney for representation or consultation. Your question and the attorney’s answer may be used for promotional or educational purposes.
Sign up to receive a 3-part series of useful information and advice about child custody law.