Hi Folks,
I would suggest to Escalate the JTAC Cases under such conditions,
If for any reason you are not satisfied with the progress of your case, you can escalate the case at any time.
Escalating a Case through Case Manager
If you feel that your case isn’t progressing as required, you can request an escalation of your case via Case Manager at: www.juniper.net/casemanager. Click on the details of the case in question, and select the “Escalate Case” button. You will be presented with six options (see Table 2 for details).
JTAC User Guide
https://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf