UNPAID SALARY

I was working in one pvt comany and salary date was 10th of every month on 12th got mail to director for 15 ppl that we are working in other company via mail and they hold salary for all which is not right we were not working with other company. So on the basis of non payment of wages i resigned on 15th nov due to non payment of wages and they hold salary and not reverting anything on mail or phone till date....my 45 days salary is pending so what kind of course of action is require...in my appointment letter no notice period is mentioned so i can leave company immediate basis..i am staying in Ahmedabad and i was working in ahmedabad office only and their head office is at delhi so where i can submit notice or legal action is require in ahmedbad or in delhi...in ahmedbad office all employee left and no one is working now