Make broken database start

Hi everyone,

(sorry if this is a dup - I'm not sure if my previous message get through)

I need an advice in database recovery. Postgresql 9.2.9.
Last night we moved one of our databases to another server following this
procedure: https://wiki.postgresql.org/wiki/Streaming_Replication
Replication, slave becomes master, pgbouncer restarts with new config,
everyone happy.
Until soon we noticed strange errors. Turns out data was broken somewhere -
we had unique indexes with duplicate records, we had missing chunks in
toast tables, and the like.
Scale of the problems wasn't clear and I fixed some of the most obvious
problems - recreated indices, cleared duplicates. Around 0:30 I started
database-wide VACUUM, it started printing messages about fixing things.
Everything seemed to work normally.
Around 3:30 database stopped responding to queries; it was noticed around
9:30 and I attempted to stop VACUUM (ctrl+c in psql command line). 30
minutes and nothing. I decided to restart postmaster. After another 30
minutes we switched back to old server. Already more than 6 hours passed
and new server postmaster is still shutting down. And I would like to get
it back to restore yesterday data.

At this point I could do with new server anything that will get database up
and running sooner. kill -9, start, wait for recovery? Server reboot?

Any help will be greatly appreciated.

Best regards,
Dmitriy Shalashov