Don't use fake email and phone numbers. What you need to do is use someone's info you don't like so they get all the spam.I use fake email addresses and phone numbers for sites that require them for access.
Amazon sent us a free Alexa. I wonder why they wanted to give us a free listening device. In the first day I came home and it was talking but no one was home. Right to the rubbish bin.
Unless you want to live in a cave there is nothing you can do about data tracking. Liks the smart TVs with cameras, if they want to see me sitting naked on the couch watching cartoons all power to them.