If trust has been damaged, it might take more than just talk to repair it. You may need to give the other person part of what they want as a gesture of good will. I've seen this go a long way in certain situations.
Of course, this comes with some caveats. For example, if there's a power imbalance in a damaged relationship, it's not appropriate for the disadvantaged side to be making sacrifices. Also, the person making the sacrifice is entitled to notice whether or not the other party appreciates it. After all, no one wants to be taken advantage of.
The point is sometimes you just need to demonstrate a charitable attitude when you want things to get back on track.