Big Bazaar / Futurebazaar / Future Retail — Cheating

We shopped at BB sohna road, gurgaon during the sale period in Dec/Jan16. The offer was " 3000 pe 3000".. It was told by the the attendents that we will get free coupons for 3000 for shopping on 3000. However post the shopping of 7000, i got two booklet coupons for 3000 each but is was shocked to see the coupon construct..
Firstly there was no free shopping for this 7000 shopping.. ( all that was told to us before shopping was a lie).. The coupons were seggregated month wise, item wise( food vs non food), 300 only free for further shopping of rs 3000 etc.. All that is not even useful and was absolutely cheating on part of BB.. Post that i decided to nevwr visit BB although i am a regular customer... To what extnt you make fools of the customer should be learnt from you guys