Amazon Voucher issue

I’ve been facing issues with Amazon vouchers. The first time I received one, I couldn’t redeem it because it showed as already used by someone else.

Then on December 29, 2025 (around 2:04 PM IST), I redeemed another voucher but never received it via email. The same thing happened again on March 30, 2026—I redeemed the voucher but didn’t get any email.

Could you please check this and help resolve the issue?