SNS has gone can't be re enabled again
Ok so after i tried everything to recover the SNS process nothing has worked but a factory reset, however Yahoo mail still gets Facebook emails without notifications so i am guessing this is a problem at their end. I would not recommend to stop the SNS process to get rid of the message "login to sync facebook with your other applications" as you can see a small issue turned into a big one. I am using Gmail now to get Facebook emails and everything works just fine. Big thanks goes to HasH_BrowN for trying to help me out solving this issue.