Hi, we just moved in to a house. Our neighbor, a pair of middle

aged Korean couples planted their trees across the line of our property. (They planted trees on the other side of the house too. But the trees are not even close to the line shared with another American neighbour.) When we talked to them, at the beginning, they did not admit they across the line. Then they said they are going to move the trees in two weeks after they redesign the sprinkler system. Can you give me some suggestions on how to deal with it? Should I wait for two weeks or do anything else? Thanks for your help.