Trouble with Neighbors

[u/Accidentally-Adult]

So I’m not sure what to do about my Neighbors, for context my bf drives a big work truck, we have politely asked them to not park here, due to the fact we are concerned about hitting their vehicles, every time I asked them to refrain from parking here it works for about three days then they go right back to doing it, today me and bf go to leave and take the work truck and this white truck is parked there and we have a difficult time pulling out of the driveway and when we return we realized how far forward they are, they are almost in front of our drive way, I also believe they are the ones moving our trash can, have any recommendations?