Major delivery issues

I have had to use Buffalo before and did not have any issues, however, I placed a very important order through an overseas company which seemingly uses Buffalo for shipping and despite my shipping address being correct, my order has now been "returned to warehouse" for a SECOND time after being out for delivery. The first time, they seemingly put the wrong address on my parcel, and today there is a "allocated to wrong driver" message. "Report a problem" button on their contact us page on website is a dead end which leads to nothing.