I'm so sorry to hear that they aren't taking matters further, the thing is your safety needs to come first, you aren't putting your self at risk are you by being involed? I say this because of the smashed windows at your mums place and the fact, that usually when someone is cut off from something, they are so used to having and they know who cut that source off they usually retaliate, it might be an idea to step back a bit from the situation,in order to get some breathing space and a bit of rest to weigh up you're options and how you go forward regarding this matter in the future.💐💐