Bharat Petroleum [BPCL] — 0.75% discount (cashback) on fuel purchase

Address:

Gandhinagar, Gujarat, 382721

I have purchased fuel 4 times on this bpcl outlet called nc desai in kalol pin : 382721.
I used 2 different debit cards for these 2 transactions. 2 times i used debit card of kotak mahendra and other 2 times i have used debit card of dena bank.
Now as per govt policy, i should have received 0.75% discount back on my account with in stipulated time frame. Today is 18/9 and i have not received any cashback till now for those 4 transactions i have done in august month.
To note that i have done many transaction on this outlet before and i used to receive cashback regularly. It is jus august month i have not received any thing. Please escalate and resolve this matter.