Way2SMS.com — cannot unsubscribe or delete my account.

Website: Way2sms.com

I had registered with way2sms.com long back but now i no more use it. It is noticed that my email box is flooded with unnecessary promo emails. At the bottom of the email body is the disclaimer that i received this email because i have registered with way2sms.
Now i want to delete my account. On way2sms website 2 support email id's are provided. I sent account deactivation email messages to both the accounts but the emails returned undelivered. Neither the promo emails have the unsubscribe link; which as per rule should be provided.

I once again request way2sms to delete my account.