Bullies at school keep bothering me even though they moved me to another school? What made them obsess over me?

In my old school I was teased so I had to switch to what I am now to avoid being teased and it worked, but there is a problem.
The boys from the other school know where I live and they seem sick to me because they became obsessed with me and sometimes they pass by my house and shout the nickname they used to call me loud, or they pass by making a lot of noise or they even threw a stone, in one they threw one on the door but it was small, they did it just to annoy me, I clarify that they did not break anything.

I told my parents about this but since they weren't in the house so they didn't believe me and called me a liar, I think I shouldn't call the police because they might not believe me either as this has happened only twice and I have no proof
Bullies at school keep bothering me even though they moved me to another school? What made them obsess over me?
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