Accenture — No communication regarding offer letter/joining date

I have given the interview on 27th June 2015. There were 2 rounds..first was taken by the HR which I cleared and the 2nd round was taken by the manager. On 29th June I was informed that I have been selected and I should come to their office on the next day which is 30th June with all the mark sheets and other documents for submission. All the documents have been submitted and till now they have not communicated how long the joining process will take. Is the joining going to happen in July or do I need to wait for some more months? The person to whom the documents have been submitted is also not answering to the call..then to whom should I contact to enquire about the joining? Atleast keep the candidates who all got selected .updated as to what is happening.