Big Bazaar / Futurebazaar / Future Retail / Hometown — Complain for not refund my money

Address: 03-097, Fourth Floor, Block No - BG, Plot No.5, Action Area - 1B, Block By Block Shopping Mall, P.O. - New Town, Kolkata- 700 156

Website: shop.bigbazaar.com/?utm_source=google&utm_medium=cpc&utm_campaign=always_on&utm_term=text_ads_responsive&gclid=Cj0KCQjw16KFBhCgARIsALB0g8L-CfBA1b_3hNAErxbHWkMPoCMKx2b2AMqxBZyAp3awD8ToUYEcwOUaA

Big bazaar order No[protected]

Order Date: 12 May 2021
I paid for total item: 11 Item
Total Amout I paid : 1332.99

I received only 7 item
Total price for these 7 items is 829.99

Total refund i should get for 4 items that is Rs 503.

I contact Big bazaar customer care but there not helping even they have blocked my no.. The same is done by Kolkata Esplanade Branch by Big Bazaar.. Nobody is giving me any satisfactory ans about the refund of the money..
I need help from Consumer Forum for this issue..

I have red marked the item that i have not received in the attachment..