Timelines after finished applicaiton to get an interview?

[bilucent]

Hello all,

I have a priority date of 2013/2, and from the visa bulletin currently priority dates from 2015 are being worked on. My application is finished, however was waiting for the interview to be scheduled for 6 months now, and have not heard anything, can anyone advice what's the best way to know about the timelines? and where to check those info?
thanks