Amazon India — Didn't received my 2000/- amazon cash on lenovo z2+ purchase by prepayment

Address:	560103
Website:	www.amazon.in

Order #[protected]
When i was placing this order it’s clear that there are 3 offers applicable for this product.
Exchange 3000 (Which i got)
Amazon cash 2000 (Issue in receiving this)
Kindle e book worth 300

Here i am attaching the (Image) offer that they are giving for this product.

Nowhere is it mentioned that the offer is between 3-10 oct in t&c.

But when i contact the customer care they are telling that this offer is expired. Due to some technical error its showing in the website it seems.

I was ordered assuming that the offer is applicable and i will get the cash back but i was cheated by amazon.

No body is giving clear information on this. They are telling sorry sir we can help you in this and simply saying it’s some technical issue.

Please help me to get my money back. They are not at least accepting the return.
Please let me know if you require any further information (I have the chat conversation with amazon, pasted below if required)

Me: order # ‎19‎:‎10‎:‎11
Me:[protected] ‎19‎:‎10‎:‎11
You are now connected to amazon from amazon.in
Amazon: hello, i'm rohit from amazon india escalations. I'll be glad to help you today. ‎19‎:‎10‎:‎20
Me: i have perchased the above product ‎19‎:‎11‎:‎01
Me: as per the following offer ‎19‎:‎11‎:‎10
Me: extra ₹3, 000 off is included in the exchange value when you purchase lenovo z2 plus under the exchange program. Offer valid only on (Black, 64 gb), (Black, 32 gb) and (White, 64 gb) variants. ‎19‎:‎11‎:‎11
Me: get cashback worth ₹2, 000 as amazon.in gift card on purchase of this product through pre-paid payment transaction* ‎19‎:‎11‎:‎11
Me: i didn't receive my 2000/- amazon gift cash ‎19‎:‎11‎:‎32
Me: its been 72hours ‎19‎:‎11‎:‎40
Amazon: as informed earlier your order is not eligible for cash back ‎19‎:‎13‎:‎21
Amazon: i've reviewed our previous correspondence and your order. I understand you're concerned about the cash back. ‎19‎:‎13‎:‎29
Amazon: however, i'm sorry, i will not be able to provide any additional information in this regard than what has been already provided. ‎19‎:‎13‎:‎29
Me: but y its still showing in the amezon ‎19‎:‎14‎:‎07
Me: didn't you infirm the technical team to remove that ‎19‎:‎14‎:‎23
Me: y you r still cheating the other customers ‎19‎:‎14‎:‎36
Me: i have seen many people are also facing the same problem, ‎19‎:‎15‎:‎07
Me: we r ordering the product thinking that we will get the cash back ‎19‎:‎15‎:‎42
Amazon: raviteja as informed earlier the cash back was only for the orders purchased only from 3rd to 10th of nov 2016 ‎19‎:‎15‎:‎44
Me: first remove the live offer that your are displaying currently in amezon.com ‎19‎:‎16‎:‎25
Me: still how many customer you will cheat ‎19‎:‎16‎:‎43
Me: you yourself is spoiling your good name with in customers ‎19‎:‎17‎:‎12
Amazon: i'm sorry, i will not be able to provide any additional information in this regard than what has been already provided. ‎19‎:‎17‎:‎58
Amazon: is there anything else i can assist you with today? ‎19‎:‎18‎:‎10
Me: soo bad, ‎19‎:‎18‎:‎15
Amazon: is there anything else i can assist you with today? ‎19‎:‎19‎:‎09
Amazon: we've been idle for 3 minutes, and i want to make sure our chat's still connected. If you aren't able to respond in 2 minutes, i'll need to close the chat. ‎19‎:‎22‎:‎34
Me: there is no use with your customer care ‎19‎:‎23‎:‎49
Me: total time waste ‎19‎:‎23‎:‎55
Me: i will be complaining this in consumer forum ‎19‎:‎24‎:‎10
Me: thank you ‎19‎:‎24‎:‎13
Me: i will not be leaving this ‎19‎:‎24‎:‎24
Amazon: i understand your concern but i cannot go beyond the policy in this issue. ‎19‎:‎24‎:‎46
Amazon: we have already explained the cash back offer and dates. ‎19‎:‎25‎:‎12
Me: don't you have a policy to provide the proper information to the customer about the offer validity ‎19‎:‎25‎:‎29
Me: no where its mensioned in t&c ‎19‎:‎25‎:‎52
Me: and its still live ‎19‎:‎26‎:‎00
Me: how ‎19‎:‎26‎:‎03
Amazon: is there anything else i can assist you with today?