Delivery staff don't speak a word of German and th...

Delivery staff don't speak a word of German and therefore don't even understand it. Again and again deliveries to my old address number 2, but I've been living in the 1st for over 1 year. Today I got a deposit permit behind my car in the driveway, but I couldn't find a package, not even in the 2nd where you always run to. Often also parcel deliveries that are not intended for me but are simply left in front of my door. DPD is fast but quality is of the lowest level.