Visa processing time

It usually takes 4 working days.
You should be given a receipt after submitting the requirements, which tells the time to collect the visa. Do you have it?

Yes, I have it. It was written TBD for collecting date(I submitted the documents in May11th). I applied for express service.
And I received a call from the visa center once in May 25th to say they still haven't received anything from the embassy yet. And since then no contact and it's very hard to get through to the Chinese visa center in Tokyo. Although in their website they have updated that I can get my passport back in May29th, but when I visited them they said(Visa center) they still haven't received any response from the embassy yet again.
I would like to recall for my passport as it's already nearing 2 months since submission for this July 11th. And I'm very disappointed in the services I have received so far, as this caused an impact at my workplace, as I had to cancel on the overseas trip and it's frustrating not being able to connect through to any related officials and not knowing what's happening and what's causing the delay.
I would be very grateful if you can guide me to know about the progression and how to get my official documents(passport etc) back?

According to recent feedbacks, the embassy is very busy because there are too many applications. Maybe you can contact the embassy directly to see how is your application going on.