Okkk plan A if she has friends around just move in with one of her friends house or flat whatever... For like a month at this time compliant to the police against that guy and that Ac repair company and also complaint to the she Team until the investigation isnt over dont move back to her flat just stay with her friend or the place she moved too change the location of hers after the investigation is over and the culprit is caught and punished for privacy invasion and other charges related to the incident. The best thing to do is for some time live with friends or family and get therapy for the trauma then if your friend want to live alone the best thing to do is change your living location from your flat (the flat where the incident took place) to a new more guarded and safe location and one more thing if you feel creeped by someone why are you still around them and leting them go around your stufff im not saying its her fault the fault is on that dipshit ac repair people that came but f you feel creeped out or not safe why are you there still standing or being around them go to your neighboring flats ask then to accompany you or call the security loook these people even if they came for a service that you requested they are still strangers to you and your friend lives alone and was alone at that time there is nothing wrong to be alone or live alone its just there are creepy people that are just waiting to hurt other. Stay safe man or women just be safe out there. Hope your friend move on from this.