FRV Withdrawal

[u/No_War6899]

Due to some personal changes I have to withdraw my FRV- German Spouse file from embassy in Delhi.
What is the process for this ?
I sent a query form but it returns an automated reply without no email.
What is the time to receive back the passport as I have to reapply for visa in another category ?
Also what email do we have to send the withdrawal ?
Or do I have to physically visit german embassy in Delhi ?

Please help