Delayed Final Pay and Post Employment Documents

So I filed my resignation letter last June 13, expecting my last day to be around July 13 pero I was cleared and did my exit interview on July 5, I was told na that was my last day. Sent a request email for post employment documents around 4 days later and I had to message hr sa viber for the email to be acknowledged and no response. Fast forward to today I followed up a couple of times this past week regarding my final pay and post employment documents and both times the response was "On Process na po and will email you once finalized." What should I do at this point?