Is it legal for me to violate the parenting time agreement due to DV no contact order?

In March/April of this year, my ex got a domestic violence charge against him for pushing me which led to an immediate no contact order between the two of us. This physical altercation came after around a year of threats (physical, emotional and otherwise) and escalating harassment of myself and my family. We went to court and I have not allowed my son to go with his father for his weekend visitation since this happened. The court told me that no contact was no contact and that there were no exceptions. His dad continues to harass and threaten me on a regular basis. So much, that I have had to report him for several violations of the no contact order resulting in him having a warrant out for his arrest. My son (9) is disabled, he is a non-verbal autistic, and requires me to facilitate any contact over the phone that could occur between them and I do not feel comfortable doing so. I feel terrible that my son has not been able to see his father in so long but I can’t put mine, my sons, or my siblings safety and sanity at risk by having contact with my ex. I have read that legally a criminal no contact order will override a civil order but I’m not completely sure. I don’t want to do the wrong thing but I also don’t see why I should have to have contact with someone who has physically, emotionally, and verbally harmed me. Especially, when they are continuing to threaten and harass me. I should note that I have sole legal and physical custody, all that is in place is a visitation schedule. I need help to navigate this complicated situation and don’t know where to start. Please, any advice would be appreciated.
CW