No delivery - is this a **** ??

The Buffalo website tracking service says my goods have been delivered to me but I haven’t received them. Was home all day when they supposedly delivered and no one came. My reference number is BUFZA***YQ. I called the Buffalo office landline given the website but I was cut off after 5 mins of waiting to speak to somebody. I sent a WhatsApp to the number provided by their automatic telephone answering but did not get a response either.