I attended an interview at Accenture. It was a day long face to face interview. I got selected from a pool of 50 candidates. It was 7 PM already. I was really happy though it was late. They again sent a mail to attend another virtual interview. That's it. No update after that. I have mailed them several times. No response at all. I thought it might for a good cause and moved on.
The hiring process literally horrible in accenture. I think your case is far better than mine mate. You have an offer in your. I don't even have that.
My advice would be to use that offer a counter offer when you apply for another organization. If you don't get any offer then stick with Accenture only.