Makro order gone missing

I ordered a mouse online from Makro Online on 9 February 2022. According to them the package was handed to the courier on 10 February 2022. Today is the 17th of February 2022 and no one can tell me what happened to the package. I did phone Makro several times, speaking to 3 different agents which each told me something else. One gave me the company's number and when I phoned them, they said they do not deal with Makro. I also got the courier's number and they do not know anything of such a package. The Makro people keep promising me that they will get back to me, but nothing happens and it seems the package is gone, or maybe never ordered by Makro. I am really desperate now.