Dstv rewards is a ****

Dstv rewards are a **** xem,on 30 September I redeemed an ubereat R50 voucher 9hours before Expiry,but to my surprise when I try to load this voucher on ubereat app it says it has expired.i took screenshot of everything and email a complaint to dstv rewards till today's 29 days later I didn't get any feedback not even a reference number,I also sent a follow up email still no feedback.