First, since you have apologized, stop apologizing. If you did nothing wrong, and you didn't to ask to see your D say you understand her feelings, but you want to see her anyway. Don't apologize for something you did not do. Validate her feelings to help diffuse the situation and like you said go to a mediator if needs be.
You need to stop trying to get her back because it is just pushing her away. When opportunities present themselves, then pursue cautiously but you have to be patient and wait for the opening.
Me29 S3 H left 4/1/09 I file 8/2/10 Divorce final 5/17/11 1st http://www.tinyurl.com/25lhu52 2nd http://www.tinyurl.com/2c35ueg 3rd http://www.tinyurl.com/322yk89