Worst customer service ever, doesn't reply whatsapps or answer phone calls

I've been struggling for 3 days now where Fastway doesn't answer their phones, closing whatsapp chats while they still have not provided any answers, they said they will het back to me, which they never do, when I follow up they ignore me. So how is one supposed to get stuff sorted if Fastway doesn't have any customer service whatsoever!!!! This is extremely disappointing!! I need my package!!!