Buffalo International logistics

I placed an order on the 23th of October and I have not received my order. I paid the customs long ago. 3 days I go my order status changed to failed delivery I don't know why. They gave reasons for why my order has failed which are totally false reasons. I've used Buffalo for as long as I can remember never encountered such. I've used the same address, same number and always received my orders I can confidently say there's nothing wrong with my address and phone number. On top of that they are not responding to emails and WhatsApp because I need them to specify on what they need from me so I can receive my package.Tried calling with no luck as.At this point I've run out of options this is my last option