Twitter stalker keeps finding me?

[Angela]

I have been having trouble from someone on twitter, i have blocked them so they cant see my followers etc, i blocked my email and i change my name and @name frequently to something unconnected to me but this person somehow still finds me we share no mutual friends, people tell me the stalker tweets my new name each time i change it :/ how is this weirdo still finding me?
If i cant figure this out i have to deactivate my twitter, which i have had 3 years, unfair!
Does anyone have any idea how they still find me?
My twitter is private and this person is blocked, all that can be protected is protected, why am i still searchable to this person?
I change my name so i cant be searched, yer this freak has tweeted, oh i see ??? Has changed her name to &&&. :/
Sonia they are protected
Thank you lux, i do exactly that, think i will have to delete, and make new