No goods received, extremely poor customer sevcice

I ordered and paid for a book, but heard nothing back . Contacted them after 3 weeks, no reply. Demanded a refund and receive the assurance that the book would e shipped in 2 days, and I will receive a tracking no. This didn't happen, so I contacted them again (by now I actually went and bought the book I needed), and demanded a refund again. No reply, no refund