Landlord entered the property without notice

My landlord tried to enter my rental without notice. I was sleeping when I was woken up with loud noises coming from my door. I see someone trying shove the door open but they could not enter as I have a doorstop(pretty strong one) under my door. I ask who it is and why they are trying to open my door but no response. I call the property manager with no response. Then I go downstairs to tell them and they say it was them, it was a mistake. When said I was a single female living alone and it was very scary for me, they said "I don't have time for you, big sh*t" and that I go upstairs to my apartment. They didn't apologize and instead they were rude to me. I have anxiety and this has been such a bad experience for me, I called the cops who said it is a civil offense and they can't do anything. I am planning to contact fair trading as I think this is breach of my lease. What else can I do, can I get my locks changed by them and not give the reception person the key? Any advice would be highly appreciated. Thank you.