Has anyone ever successfully transferred PF account to latest PF account?

Following

Yes, did it couple of months back. Took about a week or so after initiating on the portal.

If it is getting rejected then visit the epfo office. I also faced the issue, visited the office and it went well. No bribe required.

Following

If both PF accounts are on same UAN number, then it should be smooth.

Unless:

A) You started your PF contribution after Sep 1st, 2014

B) Your employer created a EP"S" account also along with EP"F" account

C) When you try and merge that account, it will fail, no redressal there.