Who can i speak to about a resthome

Wtf do you do when head office apparently cannot do anyhing to this resident (who is very sound of mind aged 63 nothing wriong with him, hangs with bad people) has been caught with bags of weed, strong weed smell comiing from his room, meth pipe has been seen his room, had his car tyres slashed in the workplace carpark, police has visited multiple times for this man. He is verbally abusive to staff he thinks he owns the place.