Accenture QA Automation Engineer interview questions

Had a techincal round followed by HR, but they again called in the next week saying I need to attend one more interview. It was a Skype interview and interviewer did not turned up for the same. Later the next month I got call from HR again to attend the interview. It's just like beginning from the scratch. Again had online test, Techincal round, after clearing both had HR round they told I cleared all the rounds and will be sending offer letter in a day or two. But it's been more than 15 days and yet no action from the recruiter. Definitely needs to work on their process