I need help with UPS.

Does anyone have a phone number or email address for loss prevention in UPS? I bought an item off this site and never received it.  I had my shipments on hold and it still shows in my UPS account but was supposedly delivered and left in front of my gate instead of the UPS store while I was on vacation. This was in late September.  I have been following all of the instructions by UPS but have caught them in multiple lies.  I would like to contact someone because I think I am being scammed by them.  The seller and shipper from here has also contacted UPS and was given the run around.  I would appreciate contact that doesn't involve the offshore "customer service".