No, you didn't do anything wrong. But, you cannot expect him to contact you after the lawyers have made it clear that you have requested "no contact/communication". The mlcer takes everything you say to heart.

I know it's difficult, but you are going to have to sit quietly and patiently now for things to turn around. In time, he may very well contact you, but right now, it appears that his anger is fueling his fire and you need to allow it to bank down to embers. Just let things be for a while.

The OW will screw up in her own time. You do not want to be a part of that. Their relationship will have to die a natural death and not one by your hand or your daughters'.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.