Keeps on STICKING their small advertising STICKERS

When I get junk mail it's easy to grab it from the gate and dump it in the trash - ALL OF IT. <br> <br> But this guy keeps on STICKING his small irritating STICKERS to my intercom - I have to carefully peel them off before I can throw it away - at times I get 3 of his stickers on my intercom, as if the guy sticking it just tries to get rid of them as quickly as possible! And this happens about once a month! Such an ANNOYANCE!!! <br> <br> I am NOT a customer and never will be, especially because of this annoyance.<br> <br> I have phoned some time ago and complained about it, to no avail (obviously).