Shāngchǎng sòng le wǒ yī zhāng yībǎi yuán dàijīnquàn.
The mall gave me a 100-yuan voucher.
Tips
usage
代金 literally means 'in place of cash'. Common in Chinese e-commerce (Taobao, JD) and physical stores — often comes with a 满减 (spend-and-save) threshold. Related: 优惠券 (discount coupon), 红包 (red-packet coupon).