ICAI — Nobody receives the calls

Address:

Mumbai City, Maharashtra, 400067

I have been trying since past 3 days to contact BKC on the seminar enquiry number provided by ICAI along with seminar details but nobody receives the call. I contacted offical BKC number and the operator provided another number. Even that number is just ringing but nobody comes on the call.
I called up RVG Andheri, where again I was given the same numbers of BKC. But nobody ready to answer my query.
How can anyone get their queries solved when people are not ready to pick up calls for which they are sitting in office.