Flipkart — Gift Voucher not received on Gmail

I bought a gift voucher of swiggy from Flipkart on 3rd Aug. Total 10 gift Voucher bought but last five Flipkart cancelled and refunded. But other five Gift Voucher they haven't send on Gmail. I contacted them. They gave me date 6 Aug then extended to 8 Aug. Now at 9 Aug i again contacted them, they are saying to wait again for 2 days and misbehaved and cut the call.

Plz Resolve this issue