Nothing will work you have to wait. Agent will tell you to wait since its under 6 months of normal processing time. I have the same issue I've seen couple of cases where biometrics got delayed by 3 4 months.
I am also facing same situation.
CEC STEM Draw 11th April
AOR: 5 June
UCI updated on 23 july. After that no updates on BIL/Medicals.
Did you get any response from them?