HDFC Bank — HDFC Bank Rewards points redemption E-voucher not received on Email/SMS/ Register Address

Address: Hyderabad

I had redeemed the HDFC Bank 10, 000 reward point coupons worth 2000Rs. They haven't send me any email or sms alert. But on 15th june 2022, i received an sms alert on my number stating Evoucher is delivered to my email id & Mobile Number. I tried reaching HDFC customer support multiple times but waste of time. They were not able to connect me to concerned team.