Waited for an important package so I was home all ...

Waited for an important package so I was home all day! At some point I received an email that the package would have already been delivered, storage location IN FRONT OF THE DOOR! In an apartment building with open access to the main street ... You can imagine the package was gone ... The hotline told me that there was nothing to be done about that, the sender had to complain, and he insisted that there is a delivery receipt and there is absolutely nothing he can do about it ... And now? Money gone, package gone, and no help anywhere ... Thanks for nothing, DPD ...