1. get a burner phone 2. get a cheap laptop and put linux on it 3. setup a non-domestic vpn on the device 4. don't use this equipment with any accounts tied to use 5. use the burner phone via vpn in order to establish social media accounts. 6. use these social media accounts over vpn to make your statements...
In addition, you may want to stow the prepaid phone and laptop in a place that you don't own, such as a public locker, etc... and/or use it only away from home.