I think someone is trying to stalk me what can I do?

This guy I know in real life I messagd him on fb cause we went to school together
We were talking and he said he wants to be more than friends I said I don't have feelings etc and he seemed ok with it
Gave him my # in fb but I made a mistake and called me at night I picked up and said wrong # cause my mom was there plus I told him I don't like getting calls or anything my mom and I share room, so I hanged up then next day he messaged me saying why didn't I answer I told him I can't. We kept taking he said he wants to hang out I said no I can't my family won't let me.
I didn't want to have him so I blocked him on fb he said he didn't had a phone and he could make calls from his computer I don't know if you can do that or not. So I blocked him today he called me last Saturday from another number and I got a call now from that number he always calls this late!
I pressed the "block caller" in my iphone so does this mean he won't be able to contact me? I did that with the other number as we'll! I don't know he was talking normal except i didn't like the fact that he calls me and I know him he dosent know where I live or anything but I got freaked out

You can tell him that you don't like him or say you have a boyfriend

This, is not stalking, this is just a guy that likes you and you blocked him, it probably hit him like a brick.

Change your number now. Block him from everything you can think of.

Be honest with the guy instead of acting like a child.