FedEx shipment confidential invoices

I am a consistent user of FedEx and I often use them for importing goods from abroad. The goods are delivered to my home. I have asked the staff numerous times (I have emails to prove it) to ensure that all confidential documents (invoice and content list) are provided in a sealed envelope when the goods are delivered, as I have someone else receiving the goods and would not like them to know the value and contents. They have not comp**** with this simple wish and instead continue to deliver the goods with the invoice totally exposed in a ziplock bag.<br> <br> I've send an email via their website also, to which I was promised a 24 hour complaint resolution. I have not even received an email or any other form of contact to date. <br> <br> Can someone please help me!!!!