Ditto what ls and CJ said.
If at some point in the future she wants to renew their relationship she can do that. But for now she's made her wishes clear, she's old enough to know her own mind, and I'd just tell him that she doesn't want to see him, period. I think the more you try to discuss it or explain it to him, the more likely it is that he will later accuse you of being behind the refusal. If he goes to court over it, your daughter can tell the judge why she doesn't want to see him right now.