Malicious damage to property & trespassing

I live in Randburg and at least twice a month K & N Gate place stickers on to my gate , gate motor and intercom box. In order to stick on the gate you have to put at least part of your body onto my property this is trespassing that fact you place the stickers over the button and lock is illegal, it is also vandalism and malicious damage to property . I have phoned you on numerous occasions and you don't care. Enough now let SAPS deal with you