Missing item that I never received and Buffalo is useless and unreliable

I bought a really expensive item that I kept waiting for and waiting for finally it showed delivered but I never received it. I've been emailing them again and again even tried whatsapp which was useless. They only responded now saying 30 days has passed. But I have sent the first email so long ago. This is the worst service *****ing thousands of my money and just claiming there is nothing they can do. I will be opening a case and cease all services from Buffalo and I won't recommend their services. This will be the day of my last order that has something to do with buffalo or temu.