Reliance Jewels — Cashback from reliance jewels is not received

Address: commercial street

I have purchased few gold jewelry from reliance jewels on 16/11/2023 and was told by the executive that Diwali cashback offer is going on and if I swipe SBI debit card of rs 25000/- I would be receiving cashback of rs 2500/- which is after 3 month of purchase. I made transaction of 2 SBI cards of 50000/- around and was assured by executive that the cashback(5000/-) will be credited to the respective SBI debit card after 3 month of purchase. Now its been around 5 month and I am keep on reaching to bank as well as reliance jewels showroom but no one is ready to resolve it. they are keep on throwing it on each other so I am seeing no use of contacting them. even I have raised compliant with reliance jewells and they closed it saying that mistake was done by executive and offer was applicable only on credit cards. while purchase I have read the term & condition carefully and nowhere it was mentioned that offer is applicable on only credit cards. Kindly help to get the cashback. I have attached the screenshot of invoice and whatsapp chat with executive(mohammed sameer) who explained and promised the cashback and complaint ID with reliance is 5090409

Thank you,
suman kumari