Dear Jyotsna Shoknwar,
Employers are registered with Local Commercial Tax Office & PT Officer (Now VAT/SGST office). Most probably your office is not regd.with the Prof.Tax Office and hence not remitted which is a punishable offence. City of Ahmedabad being a City Corporation, the PT Officer at the Corporation office is the concerned officer. You may contact to ascertain what to do & how to do.