Here&Now - Package is not delivered to me

I purchased her Here& Now skinny fit women jeans on July *... and week later on ** july the site shows it out for delivery...I wait for the product delivery but no one came..(I provide correct address)..and then on next day it shows delivered..I try to contact them via call,write us and email support...but no one respond..then on July ** I choose exchange options, so when they came for delivery I can tell about this..and it's shows on August * they are out for delivery..and then I get mail from Myntra update that 'delivery is unsuccessful We will reach you on another day' . On the next day August * morning I get the mail saying item delivered with Tax invoice...I don't know what I will do.. please help me