Poorvika Mobiles — Cashback not provided

I had purchased Samsung galaxy S21 plus on 15th june from Poorvika mobiles where 7000 cashback offer was available on making transaction through pinepg either by selecting credit/debit card option or zero cost EMI option. However while making the transaction since zero cost emi option was not available on Pinepg I went ahead with credit card option of full payment as cashback was applicable on that also. However now after 5 months of purchase I have still not received cashback and company is now saying that cashback was applicable only on Zero Cost EMI option which is a lie since I had clearly checked their terms and conditions which mentioned that cashback is applicable on both the transactions. Also since zero cost EMI option was not available during transaction it negates their point nevertheless. My order ID is 958177