VAC2 Payment

Made VAC2 payment 4 months ago and have not had any contact/correspondence from CO or DIBP for my visa 190.Payment is not reflected under manage payment of immigration online. Follow up emails went unanswered other than the automated email reply. Any idea what is holding up the process? And how should I proceed with this besides wait?
Try calling them to check the status
Hello, could you please share your present status.
Did you check in your immi account? Are there any communication? what is the current status?