Croma Retail — Cashback not received

Address:	Borivale West, Mumbai
Website:	www.croma.com

I had purchased a tv last year in september from croma store in borivali west, mumbai. While selling the tv, the executive had committed 2 cashbacks which i will get in 3-4 months time. Exact cashback amount was not committed but it was in the tune of rs. 2000 to rs. 4000 for each cashback. I just received one cashback in february of around rs 2, 200. My emi is also over now.
On the bill which is very long and confusing it's written at the fag end that i am only entitled of cashback upto 5% of the value.
Post march due to lockdown the shop was closed and now the shop has opened and they say that no scheme of 2 cashbacks are there.
Since it's not mentioned explicitly on the bill i can't even fight. This is clear case of misselling. Never expected this from a company that belongs to tata group.