"Lost" package excuse getting old

Seems like packages mysteriously getting lost is a common theme for these people. 21 working days and I have to contact them every time. I don't want a refund I want a replacement, since my package has also mysteriously disappeared into the Burmuda triangle. You either have the worse courier company in history or you have no clue what's going on. Lying is just easier, right?! I don't believe my package was lost and now you're suddenly out of stock. I'm done working with agents, I need a supervisor to contact me. Your service is despicable! If I gave one of my customer this service I'd have difficulty sleeping. Horrible!