Shut your phone off, at night. No need to let an idiot remotely disturb your sleep. There's lots you can do to secure doors and windows. You can prop boards underneath the door knobs jamed against a small cleat screwed to the floor. Put pins in the hinge sides of the doors. Wire screens or steel bars screwed into the windows. Hang windchimes against the windoes or doors at night, so they will chime if someone rattles them. Or, you can get a security company to put sensors on all the windows and/or doors. Lots of other things. Read up on it.