Zerodha — Difficulty in account closure

I want to close my account, but zerodha is not responding and helping in this process. All their head offices are closed so it's not possible to send them physical form. Whereas they want us to fill form in ms word and esign it with digio, but digio charges 50rs for esign with adhaar card. But by sebi account closing process is free. Whereas in angel broking we just send an email and they close our account. Worst service by zerodha i'll not recommend it to anyone.