About a restaing order

If the restraining order is a preliminary or temporary one, there should already be a hearing scheduled, before a permanent restraining order gets entered, and you should have gotten notice of that hearing with the order.  If the permanent order has been entered, you may well be able to file a motion to have it vacated.  You should really have a lawyer representing you, in either case;  the law of restraining orders can be fairly complex.

At the hearing, you will need to prove that what was said about you was untrue.  You can do that by presenting witnesses (including yourself) with personal knowledge of the facts, or documents or other evidence.  But what you "know" doesn't count.  Sometimes, the only way to expose a lie is with the lawyer's art:  cross examination.