When I stopped the conversation on the phone and ended it by hanging up, he used the time until I blocked him again to insult me via text messages. I am done talking to him at all now. My landlord can ban him from our house, and I think I should get some counselling on this.

It just feels so awful. I hope he backs off now. I am amazed by how rude and reckless his behaviour is. He has a twisted view on reality right now and he twists everything. He is overstepping the boundaries but I am the mean one who ignores his feelings - I should know better, but still it messes with my mind...
Thank you ladies for your comments. I would never have expected that this thread might turn into a Stalker S.O.S handbook