What happens to DPD drivers if they deliver to wrong address?

A DPD delivery driver took my order to the wrong address. From the photo, I think I can guess where it went BUT the people who live there are problematic and I really don't want to knock on the door. They have serious mental health problems and have threatened people with knives before so all the neighbours leave them alone. I don't even know for sure if they have it. However, if our DPD driver is going to be unfairly penalised for a genuine mistake, then I'd rather try and get the parcel back myself. I know it's probably a crappy job and I don't want to add to their stress. I'm just weighing up the best thing to do here. Are there any DPD drivers out there who can advise?