Here's what we know about her upbringing:
* Raised by Miss Havisham: Estella was raised by the wealthy and bitter Miss Havisham in her decaying mansion.
* Taught by Miss Havisham: Miss Havisham personally instructed Estella in the arts of manipulation and coldness, intending to make her a tool for revenge against men.
* No mention of formal schooling: There's no evidence of Estella attending a school or having traditional schooling.
While Estella does demonstrate a level of education, this is likely due to Miss Havisham's own education and the potential presence of tutors in the mansion.
So, while Estella was "educated" in a way, she did not attend any specific school or institution.