refund gstr -4 return..

Divya Shetty (65 Points)

19 January 2018  
..
wrongly paid RS.750/- under penalty head actually it should be under interest head, but on same date applied for refund.. , while applying for refund bank account number was asked but still no updates on credit of amt.
in how many days it will get processed for refund.. and also no balance shown in ledger ..
could any one help on this...