Giant Supermarket 10% Cashbacks with OCBC Card Promotion days 0 0 hours 0 0 minutes 0 0 seconds 0 0 April 10, 2018 121 Views On every Friday to Sunday, pay with your OCBC credit or debit card at Giant to enjoy 10% cash back, up to a maximum of RM50 per cardmember. Valid till 29 April 2018.