Package marked as delivered whereas I didn't receive anything

My biggest issue starts on the 27th where the courier guy calls me in the morning to tell me that he has my order and would be delivering it, I ask him to let me know once at the gate as I'll ask someone to receive it since I was on site, the guy doesn't arrive and doesn't call me. I call to check what the delay might have been and he says that his manager says he must not deliver the order as it is not in their area(bare in mind they've delivered atleast 3x last year with no issues)... I tried contacting the Buffalo number given I was told they would reschedule another delivery day. Today I didn't receive any notification that they would be delivering but only received an email stating that my order was received and signed for but I currently don't have my package. Someone please explain how the hell is that possible??