Amazon India — Mobile cachback

Address:	Vadodara, Gujarat, 390007
Website:	www.amazon.in

I buy mobile 6999.00 on amazon online on date 8/8/2016, that time 10% off offer is running on if i use SBI Debit/Credit card. i use then they told me after 3 months cash back will get. and 3 months completed still i dont get cash back. and after i called a lot of time in amazon customer care then now they says i use netbanking option to buy but i didnt use netbanking. i had punched my card no. and order by mobile amazon app. pls take some legal action on them.