Possible City of Toronto Scam

My fiancée and I rent a basement apartment in Toronto. A guy circled our house, stayed outside for a bit, and then kept knocking. After opening the door he said he really needed to come inside our house. Once we denied him of entry, he held up the Grey box that he destroyed, he said he really needed to come in and fix the water meter. We denied him again and he handed us the photo of the City of Toronto slip. When looking at the slip you can see all the proper numbers are crossed out and one is taped over. My landlord called the labeled number and it ended up going to an automated voicemail and then he received a call saying his number will be disconnected. Can someone please let me know if this has happened to them or if it seems like a scam? My neighbourhood is in the know and thankfully my landlord and uncle live within my neighbourhood.