Reliance Digital — reliance digital cashback not received on my hdfc debit card

Address:

Reliance Digital Ground Floor 35, Guru Jhambeshwar Nagar, Gandhi Path Vaishali Nagar, Jaipur

I have purchased lg fully automatic washing from reliance digital vaishali nagar branch on[protected] & the executive aman confirmed me that i will get a 10% cashback of invoice amount rs.15965.31 on my hdfc debit card, but as on 4-6-2020 i have not received the cashback.
We paid with hdfc debit card. They made the transaction at their end and assured us to credit the cash back within 90 days.

Even after 6 months when we did not receive cashback.
I have attached the invoice.

Store address:reliance digital ground floor 35, guru jhambeshwar nagar,
Gandhi path vaishali nagar, jaipur. Contact:[protected]/ 2355519

Thank you
Mayank tandon [protected]