You are speaking to members like yourself, we have no access to your account or deliveries.
Who was the email from?
Have you asked neighbours looked around the property, maybe it was left in a safe place. Was this a Royal Mail delivery? Ask your postie today where they left the item.
You can open a case for item not received, but if the seller has tracking which has shown delivery, it will close in their favour.
@nazmul2010nazmul