Do you have visitation rights with your daughter? If so, you can enforce those rights.
Naturally it's preferred that everyone works to get along, you and the child's mother share a child and your daughter and you should have a relationship. However, if the Court has awarded you visitation rights and you are being refused visitation you can file a motion for contempt against the mother -- the mother has a duty to ensure you are able to exercise your visitation rights even if the child states they do not want to visit.
Be prepared for a rough time, though. Sometimes once the visitations start back up there aren't any issues, but other times you'll have a very unhappy teenager on your hands (and every parent of a teenager knows how difficult they can be when they are unhappy) and you'll have a lot of work to do to try and rebuild your relationship with your daughter.
There may be other issues you will want to look at. It is certainly a problem if your daughter is not attending school, and if the mother isn't making sure the child goes to school there are probably other problems as well.
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