Help plzz!!!?

Ok hi, i need help! Last night i Was looking through my old phone, In i saw a number in my phone in i thought i would call it. Well i called it then hung up. Well then he called back i didnt answer. I texted him saying Oh my bad Then he txted back saying who is this? In then yeah there was more buh long story cut short. He asked me who i was im like im Kristyn. then he was asking all these questions like How old am i who i am where i live. Im like why he said because juss tell me in i`ll leave you alone im like no PERVERT! so then he kept calling i never answered then i told him to leave me alone He txted back saying '''' im like uhm excuse me don`t you know that im a girl? In then i told him to shut up. Then he left me alone for a few hours then this morning when i got up i had a miss call from him. No msg tho. Then like 30 mins ago he called me I didnt answer. Then i txted him saying ''Why cant you leave me alone?'' Then he called back again. This is really bugging me