Rollback segment datafile deleted

1. Somebody deleted the rollback segment datafile from the server.
2. The database cannot be started again.
3. startup mount
4. alter database datafile 'rbs01.dbf' offline drop;
5. alter database open;
6. ORA-01545 rollback segment 'RBS01' specified not available.
7. Sometimes, it will throw a ORA-00600 error.

The following is what I did, but it failed:

1. startup nomount
2. alter database backup controlfile to trace;
3. re-create controlfile
4. recover database;
5. alter database open;
6. ORA-00600: internal error code, arguments: [25012],[1],[2],[],[],[],[],[]

7. select * from v$tablespace;
        TS#    NAME
        0      SYSTEM
        2      TEMP
        .....
   

8. select file#,name from v$datafile;
        FILE#  NAME
        1      system.dbf
        3      temp01.dbf
   

I think the database has been dropped RBS tablespace, what can I do?