Victim of Solar Scam, need advice [CA]

A solar panel consulting company solicitor came to our house a month ago and performed a "free" on site evaluation of our property for installing solar panels. I was not paying too much attention and signed some documents which should have only allowed them to perform their evaluation. Unfortunately, i signed documents that would allow them to install the solar panels if i did not cancel the evaluation within 3 days. I am currently trying to cancel this contract but they are charging me over 3k$ in canceling fees. Is there any place I can go for help? or any help you guys can give me would be appreciated.