An obligor may request a family court hearing in writing within fourteen (14) days of the date of the mailing of the notice described in § 15-16-6. The family court shall notify the obligor by first class mail of the date, time, and place of the hearing within five (5) days of receipt of the written request for hearing. The only basis for contesting income withholding initiated under this section is mistake of fact as set forth in § 15-16-5.