Amazon India — offers which has mentioned in website is not provided

Address:	600100
Website:	www.amazon.in

I have a placed an order on amazon website and there is some free products that has been mentioned in website and that is not provided to me and when i reported it to the amazon service even they can see that there is an offer and they said there may be some glitch happened and they apologize for it and they arranged a call back to me by escalating this to further and i got a call back today stating that they cannot do anything and the reason they stated me is there were some team who will be working here to remove the offers page are not available so they couldn't do that and this some internal issues but they are stating even though if its a internal issue we are unable to take your request and the request is closed. So this cannot escalate this further.

Amazon reserves the right, at any time, without prior notice, without liability, and without assigning any reason whatsoever, to add/alter/modify/change or vary all of these offer terms or to replace, wholly or in part, this offer by another offer, whether similar to this offer or not.

This is terms and conditions they gave it to me and they stated that they have a rights to cancel the offers at anytime and they can inform that to the customer

And here the word they are using is not matching with the terms and conditions and they have stated clearly in t&c that it can be replaced by different offer and even they are not ready to provide

I don't know whom should i contact in this and they are telling me that this cannot be escalated further.