Vishal Mega Mart — Item not provided while shopping in terms of buy one get one free

Address:

Tezpur Assam

Sir,
I Pawan Kumar Singh shopped a cloths at Vishal mega Mart Tezpur Assam near BSNL office on 16 mar 2021 with my family.I had taken a jeans ok blue in colour but I couldn't able to see the tags of buy one get one and put it in basket .I purchased items cost 4636.00 total itms twenty.
At counter no three biller name JOHN D AS did not tell about this nither the lady at checkout gate told to me. I came at home and checked and saw one item missing which was one jeans offer's buy one get one..I approached Vishal mega Mart store on 18 mar 2021 for this, talk almost all staff and every body denied to give the item in very rude manner and Nither they talked to manager nor allowed me to talk to manager.