My daughter just got out of an abusive relationship and the guy won’t leave her alone how can i get rid of him
Call the police so that she can press charges against him and file a restraining order. Especially if you think she is in any sort of immediate danger, the behavior needs to be reported so that they can take steps to head it off before it escalates further. In general, magic should never be used in place of taking the necessary mundane actions first.
If you’ve gone the legal route and need to boost your efforts, you can look into protection spells/charms, spells that might work towards a peaceful resolution of the relationship, or ones that would simply encourage him to move on. In more extreme circumstances, you could also look into something that would bind him from doing any harm to her.