If they don't want to talk with you and hear you out, then that is the way it is for them. Respect their stance, and move on. In your effort just remain sincere if later on they want to hear you out, go ahead and make the amend. Our making amends is important, but we are not to cause "harm" to another in the midst of us clearing out our past wreckage. The onus is on us to be responsible for our past behaviours even if we can't for whatever reasons make direct amends. In these circumstances we have nothing to fear about the quality and steadfastness of our sobriety if our efforts have been sincere.
Rob