Package gone missing due to negligence of courier company

A package was couriered to me from a company and DSV was the company assigned to deliver my package. I was not at home on the day of the delivery. The delivery guy from DSV phoned me to inform me that nobody was home and that he dropped the parcel over the gate onto the back of my vehicle. I informed him that I will be home the next day at 12:00 and that he must rather return the next day as this was an important document that I am waiting for and paid for. He informed me then that he already dropped it over the gate and can't retrieve the package. On my return home the package was to be found nowhere. The courier guy then came to my house the next day searching my garden for the parcel...with no luck. He then told me that he will report it to DSV. I contacted DSV and explained to the person in the call center what happened. That this parcel was delivered without me being home or signing for the parcel. He investigated the matter and forward me a piece of paper with my surname written on it but clearly not in my handwriting or my signature. Well it is a week later and I am still waiting on feedback from DSV what they are going to do about this situation. I paid for this document and due to the negligence of one person I am still waiting for my parcel.