You can only enter a coupon code once you've landed on the Cart page; just before you're about to check out and make payment.
The coupon code field is located above your cart total on the left hand side of your screen. Your discount will reflect immediately upon clicking the Apply Coupon button.
Wanna know more about coupons and promo codes? Check our T&C's.
Please note that the FIRSTGRAB coupon has a maximum discount of R100 off your basket total.