Here is the legal status for PDL's in NC:
North Carolina State Information
Legal Status: Prohibited (N.C. Gen. Stat. § 53-281 authorizing payday loans allowed to sunset in 2001)
Citation:
The consumer finance act applies. N.C. Gen. Stat. § 53-173
Small Loan Rate Cap
36% per year
Where to Complain, Get Information:
Regulator: North Carolina Attorney General (See also Commissioner of Banks)
Address: NC Attorney General's Office 9001 Mail Service Center Raleigh NC 27699-9001
Phone: (919) 716-6400
Fax:
Apparently since they are illegal you are only responsible for repaying the principal balance plus interest as it may legally be applied which is 36% per anum.