Talk to the manager, especially to point out that neighbors have already complained and that this could negatively affect the contractor's reputation. Whether this will help remains to be seen.
You definitely don’t have to put up with this. Every construction worker is responsible for their own mess!!! Approach the workers calmly and talk to them about it. If they give you a rude response, simply ask if their home looks like this too!!
Exactly!!! It’s best to actually talk directly to the workers themselves. (There should be something like "Spickmich" for construction companies as well)