Can i use a public defender in family court in south carolina?there is a order based on my past employment wages ?

i havnt worked there in 7 months.there is no way i can afford this amount of backpay/im also awaiting trial in a criminal court with threats of losing my parental rights.the judge told me today,which was my first day to appear,that if i dont have this 4,000.00 backpay i will be jailed for 30 days/i was told by a friend i cant use a public defender