South Carolina officials have added more operators to a hotline for residents to call if they believe they may have been affected during a hacking of the state’s Department of Revenue. About 3-and-half-million Social Security numbers and almost 400,000 credit or debit card numbers were exposed during the security breach, which was first announced Friday. During a press conference Monday, Governor Nikki Haley stressed there’s still plenty of time to sign up for free credit protection service the state is offering in the wake of the hack.