Reliance Digital — Discount not considered in online purchase

Address:

Nanded City, Pune

I Have Purchased Hisense 108 Cm (43 Inch) Ultra HD (4K) LED Smart TV, 43A71F Through Reliancedigital.In. (Order No: RDF[protected]. The Price Mentioned On The Website Was Rs: 30, 990/- And After Deducting Discount Of Rs 2, 500 (Coupon Code : JUN1000) The Order Total Was Showing 28, 490/-
After Proceeding With Online Payment, The Full Amount Got Deducted From My Bank Account. Without Considering The Discount Of Rs. 2, 500/-. Kindly Suggest How To Get Refund Of Discount Amount Of Rs.2, 500/-
I Have The Screenshot Of Final Order Total From Reliance Digital Website Showing The Order Total Of 28, 490/- After Discount

I Had Contacted Reliance Customer Care[protected], The Representative Informed Me To Email The Issue To Get The Refund. Then I Have Forwarded My Complaint To [protected]@Ril.Com, Bm.[protected]@Ril.Com, Cshead.[protected]@Ril.Com But They Only Replied With Demanding 8-10 Hours Time To Resolve The Issue, Thought I Followed Up 5 Times Since 5-Jun-2021 And Each Time I Have Got The Same Reply Demand Time To Resolve The Issue But No Resolution As Of Today 16-Jun-2021.