303, Tower - A, Peninsula Business Park, G. K. Marg, Lower Parel (W), Mumbai 400 013 India.
In absence of response/ complaint not addressed to your satisfaction, you may lodge a complaint with CDSL at https://www.cdslindia.com/Footer/grievances.aspx or SEBI at https://scores.gov.in/scores/Welcome.html
Please quote your Complaint Ref No. while raising your complaint at SEBI SCORES/ Depository portal.