Bharat Petroleum — Denies to redeem e voucher

Address:

MAA ANNAPURNA OIL SERVICE STATION , PARUL, ARAMBAGH

I live in arambagh near axis bank, i had a bpcl evoucher, voucher code is[protected], valid till 23/06/23,
to day i visit to the branch to reedeem my voucher but the attender clearly denies to redeem the voucher without any information, then i asked to call manager but this guy also denies to call the manager, please tell me what is the next step to taken .