Amazon India — did not get promised cashback and always misdirect me

Website:

www.amazon.in

Hello,
I am complaining about did not get cashback as amazon promised. I had purchased moto g5 on 13 may, 2017 from amazon.in and payment done from my city bank debit card. On that day there was offer of 10% cashback if you paid by city bank debit card or credit card so as per this i should get cashback. After that i also received mail that you will get cashback till 11th august, 2017 but still did not get.
Before 11th august i had word 2 to 3 times with their customer representatives told me get it by 11th august 2017. After 11th august still did not get cashback then again contact swamy t (Customer represnetative) on 17th august, 2017 to then they asked me to send last month transactions and i had sent you and they told me that we have escalated this issue you will get update in 7 business days. Then i had contacted again payel (Customer represnetative) on 24th august, 2017 and she told me as per calculation saturday sunday did not count in business days so you would get cashback sure on 28th august, 2017 and still did not get. I had again mailed on 1st september, 2017 and this is mail from amazon:


I am really frustrated with this and i am facing this issue second time on amazon. First time cashback was credited to my wallet but they did not credit in my bank account as they promised. Please find below order details and also check invoice which i have attached:
Order number :[protected]For this order did not get cashback)
Order number :[protected]For this cashback credited to my amazon wallet not in bank account as they promised)
Please help me regarding this. Thanks in advance

Best regards,
Ketan sangani