Takealot Tookalot

I got ABSA REWARD R500 if I but R1500 or more, the special ends the 2nd June 2024, on the checkout I redeem the voucher, it says its already used, next I write an email to Takealot, instead of attending to my quiry they give me R150 to use on my next sport purchase purchase, I'm very disappointed, who said I want R150 when my bank rewards gave me R500, TAKEALOT I want my R500 coupon please, the 2nd is tomorrow assomblief