By this point, if you're buying 'smart' devices, particularly from Google or Amazon, you should assume you're paying them the purchase price of the product to spy on you. Ars Technica has more on the microphone the Nest products contained - but that was not included in the spec sheet describing the device to consumers.
Personally, I'd demand a refund. I'd also demand to see the entirety of the data the company had on me, and if there was stuff there I didn't think they should have, I'd also demand they delete it.
Their search engine collects every search you conduct using it (and keeps that information, clear back to the first time you used it), and all the products they make link your use of them to each other. They say you can review the searches you've conducted and remove information you don't want in the file, but I am confident that only removes it from YOUR sight, not theirs.
I have zero trust in any of the big tech companies, and considering they were spawned by American intelligence agencies, I shouldn't trust them. This is why I don't use Chrome, amongst other things.
Neither should you.
