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Hi. I've been in the same boat as you, but what has helped me is a follow up mail/call. I suggest you follow up with them regarding your interview.

All the best.
In India, unless it’s a big professional firm, please always call up HR and follow up. People don’t care unless you call them up and chase.

In fact - even after you join your job, you’ll be chasing parties to share documents during DD.
Yes, call the managing partner but also apologize for troubling him via phone.