Big Bazaar / Futurebazaar / Future Retail / Hometown — charging gst extra

Address:

Phoenix united mall , lucknow, Lucknow, Uttar Pradesh

I have recently purchased a jacket from big bazaar. The jacket was listed at 2299₹. I checked the lable it said inclusive of all taxes. Since it was some offer there, big bazaar was offering the jacket at a discount of 50%. So the price should be 1149.5₹, but they charged some 6% gst extra over the same and made the bill to 1209 ₹. I paid the money and went to woodland to check for the same. But no extra gst was charged there. I have all the original receipts to prove my case. Please settle it at earliest.