Straighten it! If you have a strighing iron that the best method but you can reset it with boiled water poured over the wig. (You might have to do this a few time.)
Then you can recurl it once it's strigh with hand curls if you have a straightening iron or curl the wig then pour boiled water over it again to set and let it dry in place.
Arda wigs can take beating in terms of styling.
This wig was completely restyle due to frizzy poofiness at the ends as we.