Amazon India — Closure of Account and Continuous Spamming

Dear sir,
it is intimated that I am no repeat NO LONGER interested in your membership and I have tried closing my account and even changed my mobile number.
But you have not closed my account and are resorting to daily multiple promotional mails. it is sad to see the attitude and behaviour of your Company which is nothing but cheap and most unlike or unworthy of a reputed company. In contrast I have never got nay promotional mails from Flipkart/ myntra / or any other ecommerce org.
Now, through this column I am requesting you to :-
Close/ delete my account-linked with email id-hsbkg.[protected]@gmail.com
Stop sending me daily mails on the a/m id.