S.C. Code Ann. § 33-13-280 – Procedure if shareholder dissatisfied with payment or offer

(a) A dissenter may notify the corporation in writing of his own estimate of the fair value of his shares and amount of interest due and demand payment of his estimate (less any payment under Section 33-13-250) or reject the corporation's offer under Section 33-13-270 and demand payment of the fair value of his shares and interest due, if the:
1. (1) dissenter believes that the amount paid under Section 33-13-250 or offered under Section 33-13-270 is less than the fair value of his shares or that the interest due is calculated incorrectly;
2. (2) corporation fails to make payment under Section 33-13-250 or to offer payment under Section 33-13-270 within sixty days after the date set for demanding payment; or
3. (3) corporation, having failed to take the proposed action, does not return the deposited certificates or release the transfer restrictions imposed on uncertificated shares within sixty days after the date set for demanding payment.
(b) A dissenter waives his right to demand additional payment under this section unless he notifies the corporation of his demand in writing under subsection (a) within thirty days after the corporation made or offered payment for his shares.