If a court does not approve acceptance of a testamentary guardian of a minor under chapter 30.1-27, the court shall immediately transfer the guardianship portion of the case to the juvenile court and order the child be taken to the juvenile court immediately or to a place of shelter care designated by the juvenile court, or release the child to the custody of the child’s custodian, relative, or other responsible adult able and willing to assume custody of the child, to be brought to the juvenile court at a time designated by the court. The juvenile court shall immediately reappoint the guardian ad litem who served in the probate case whenever possible, or shall immediately appoint an alternative guardian ad litem.