Sastasundar.com — refusal to unsubscribe

I never subscribed to receive their promotional messages or mails. However, i keep receiving them.

I e-mailed them twice telling them that i never subscribed and that they must stop their promotional messages and emails to me.

However, there has been no response and i still receive the unwanted and disruptive mails.

I must be unsubscribed from these messages and mails immediately.