Need Help...?

I'm single right now and just a week ago there were two guys in my life and i just got rid of both of them. The cyber guy i met in the internet was banished but the real guy, the one who was cheating on me, came back to my doorstep and he's saying sorry, and so on and so on. He keeps leaving messages and i told him to stop. He sends me flowers with these notes almost everyday. I'll never forgive him after what he did to me. he got me a puppy and i gave it to someone else. I told him to stop and he came to my doorstep another time. Blah bla blah i don't want to talk about it. All i want to do is get rid of him. I think i need to do something more than just telling him to stop. Something that's not cruel or anything...