I posted a little while ago about something that looked like a fork.
I had like 9 peers on that fork..
I deleted peers.dat and the chaindata, resynched from a backup earlier this summer.
The new synch had no problems, and is also on same chain as yobit
The pool "not paying" is probably paying ... you just dont get it because your chain has stopped.
I suggest taking a backup(always!), and resynch from an older backup.
If you dont have backups (bad move!) do a complete resynch or download a bootstrap from somewhere.