This situation is more common than people assume, and the fact that you waived your victim rights is actually a meaningful step that works in your favor. Waiving those rights formally signals to the system that you are not seeking separation from the offender, which is relevant to how the facility will evaluate a visitation request.
The key is getting the right person at the facility to understand your situation and the legal steps you have already taken. The warden has the authority to make exceptions to standard visitation restrictions, but reaching them requires going through the right channels. If direct contact with the warden's office has not worked, try putting your request in writing and submitting it formally through the facility's administrative process. A written request creates a paper trail that a verbal inquiry does not.
Your husband's case manager or counselor is another entry point. They can advocate internally for the visitation approval and may have more day-to-day influence over these decisions than a warden who receives hundreds of inquiries.
If the facility cites any court-imposed no-contact order as the barrier, that is the piece that needs to be addressed legally before the facility can act. A no-contact order from the court supersedes anything the facility might otherwise allow, and the only way to remove that barrier is through the court that issued it. An attorney can file a motion to modify or lift the order, at which point the facility would no longer have a legal reason to deny the visit.
Document everything, be persistent, and consider consulting with an attorney who handles family law or criminal defense if the court order is the sticking point.