Can I recover in the following scenario with appying the arch redo logs

Hello
Please, can someone advise me on the following problem.
I have the following confusing scenario:
1. Database files reside in location /oradata
2. Archived redo logs reside in /oralog
3. On 5.Oct the database was working all the day
4. On 5.Oct night a stupid UNIX admin has resized some partitions on the OS /oradata, but after that has restored all the /oradata files (physical copies at UNIX level he has taken the day before) from 4.Oct. night copies.
5. So, we now have lost all data from 5.Oct.
6. I don't have any backup with rman, except of the control files.
7. But I do have the archived redo logs from 5 days back.
7. Just in case, I have taken expdp backups of all schemas from 5.Oct. night, so I can import data back from them, but can I apply a faster solution - can I use just the archived redo logs which to bring the database back to 5.Oct night state, and if yes how?
Thanks in advance
Evgeni

Hi Maran and all,
Thank you for your replies!
It is a test environment but close to production date - anyway, they don't have an Oracle support ID yet.
The UNIX files were just copied with cp command with database being down (not using rman or any Oracle utility).
Another issue is that after the partition on the server was resized I needed to make some structural changes to the database: i.e. I recreated and distributed the UNDO tablespace and also split some data tablespaces into new tablespaces, and also renamed some datafiles. Before doing that when I started the database first after the UNIX partition was resized I was receiving:
ORA-38739 Flashback log file is more recent than control file.
Which I could not figure out why - but now I know that the reason was because the datafiles were one day older that the archived redo logs and flashback logs; I did not have an idea at that moment that the admin has restrored older datafiles.
So, after receiving ORA-38739 I recovered the database and cleared all the flashback logs (too bad I lost them). Then I made the structural changes described above.
Sorry that the case may sound too confusing but it would be an interesting point for me to see whether and what can be done now.
So, to put in once again in short:
1. Datafiles were physically copied to their location with copies from Oct.4
2. Then structural changes were made to the database on Oct.6
3. Now is it possible to get the data back for Oct.5 having only the archived redo logs (flashback logs were lost for the reason I described above, and no rman backups of datafiles exist).
Since I have logical expdp backups of everything I can experiment now with this complicated case. So, feel free to advise just anything.
Thanks in advance

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