Of course, you could also try harrassing the person back in return and stalking them when they are not stalking you... the hunter becomes the hunted... what they do to you bring it to the next level and return it to them...
On the other hand...
what about a confrontation when you're armed with a baseball bat?
i personally thinks u shld not change ur no. 1stly its not easy
2ndly that isnt the way to solve the problem
users like us dont use the fone for free..we pay and we get what we should.. i urge u to complain to ur mobile service hub or contact the police..