Review incompetence

I did not receive a sms that my parcel has arrived, next thing i get a call from a stranger telling me that they have my parcel, it was given to them by mistake. What if this person had opened my parcel and saw what was inside and took everything out and replaced with other things? What if this person was not honest? I would have lost a lot of money. This is very incompetent and when i spoke to the manager, she says to me "these mistakes happen."