Well, if they don't provide a way to unsubscribe it is actually illegal to do what they did, and could be fined per email sent. Given the situation you described I kind of doubt they did.

As for the terms and conditions violations, aka selling / using information - you're not going to get them. People stopped expecting privacy a while ago, and every conversation ive had on the subject the past three years always goes something along the lines of: "I always expect all my data to be given out and used"

If you don't want that to occur don't use the internet or use a company you trust. For example, I trust a university to keep my data secure because it's legally obligated to. Similarly, I trust most products I pay for, I don't trust pretty much any other app.