Bajaj Finserv — cashback not received on loan

I am a frequent customer of consumer durables and almost every time i took help from bajaj finserv for finance.
This time it was no exception when i planed to buy an ac from khosla electronics (Selimpur showroom, kolkata-700031) i was told by the representative of bajaj finserv that if the loan amount exceeds rs. 29, 999/- i am supposed to get a cashback worth of rs. 7500/- [ cashback rs 800 + mobile recharge rs 2000/- + book my show rs. 2000/- +bigbazar rs 1200/- +bata rs. 1500/- ]. I was also told by the representative that these cashback/ coupon codes will be directly delivered to my registered email/mobile no after three successful payments of outstanding emis of the said loan. I bought the ac on 29th september 2019 and already paid five emi instalments till date but yet receive any cashback. When i enquired for the same in the showroom with the same representative he tried to avert the query by saying it was a contribution cashback scheme, which is not true. I then showed have a captured image of the advertisement said scheme but he kept on delaying for week after week without any result. Please look into the matter as early as possible so that i really can't wait for indefinite time for resolving the same.
I am sharing the image of the bill for the purchase and the image of the advertisement cashback scheme for your perusal.