Tata Consultancy Services — Onboarding Delayed

I have received an offer letter from TCS on 27/12/022 with reference number TCSL/EP2022RA1157921/ Chennai/2018905 for the position of IT Analyst Grade C2 in Pune, which I accepted and my Tentative date of joining was 06/02/2023.
However, on 03/02/2023 I got an email from my onboarding manager saying that since one of the system procedures is pending, they won't be able to onboard me on the mentioned date, and asked me to reach out to my HR Recruiter.

After the conversation with my recruiter on 06/02/2023, I got to know that there was an issue with BGC, and I mailed the mentioned documents to the HR and he said he'll try to onboard me as soon as possible.

It has already been 5 days past my onboarding date and still there is no update.
I have already resigned from my previous organisation and shifted to Pune.
Kindly give me a proper update and/or steps to follow at the earliest as I'm going through a very difficult situation.

My EP Ref No: EP2022RA1157921