A lot of people complained that their wallet address they submitted at mainnet checklist task 3 has been changed and it wasn't them that made the change. The Pi coreteam had to check everything again to see where the fault was coming from ,so many Pi sent to most wallets where taken back. If you have luckily moved it to your available balance before they did it ,they won't be able to take it back . The available balance is the real Blockchain no one can take anything from there one it gets in there. Once everything is sorted out you guys will get your Pi again. Some people got their accounts hacked , scammers are not sleeping anymore. The Pi coreteam said you guys shouldn't use the same password you use for everything for your Pi account it's easy to hack like that. I warned about Facebook log in already,I believe most of these accounts where hacked into through Facebook log in method on the Pi app. Secure your Facebook now with two factor authentication (2FA ) now .Go your Facebook settings and do that.