I used to rent from a letting agent. They were awful. Boiler not working? "You can buy an electric heater for £25 you know". Quarterly property inspections most of which they didn't turn up for ("It's not an appointment as such" - aye well I still took annual leave for it, now wasted) ... you get the picture. I got evicted in the end, landlord selling, they were bastards about that as well ie I was literally on the cusp of getting a secure HA tenancy and told them so on the day notice was up, but still they threatened to come to the door and change the locks (illegally), had to get council tenancy officer involved, just all round bastardry really.
Anyway came home from work today, big glossy brochure from them about their airbnbs etc, multiple copies left on the communal mailbox. Wibu to send them all back without postage together with all the other tonnes of crap that's accumulated in the hallway? And to continue doing so indefinitely?