Big Bazaar / Futurebazaar / Future Retail / Hometown — overcharged

Address: City Square Mall, 118/1, GS Rd, Bhangagarh, Guwahati, Assam 781005, Kamrup Metropolitan, Assam, 781005

I exchanged a jeans yesterday 21/04/19 at bb bhangagarh guwahati which price was rs1099 but they charged rs1199 when i said why they charged rs1199 when the price was rs1099 they said no maam the jeans price is rs1199 and they even cut the price tag when i brought another pair of jeans of same brand with the proper price tag to show them which price was rs1099 they said we charged extra because of the bigger size jeans why they lied at the first place why they said at first the price is rs1199 when they proved wrong why she said we charged for the bigger size if they were genuine they could have said it at first they didn't they thought i won't checked the price tag again they are fooling customers this things didn't happened with me only this things happens with thousands of customers this thing didn't happen only once but many times...they charged me extra rs100 please solve my problem ASAP