Salary not provide

Hello sir, i am working with pvt ltd company from april 2017 where i am not signed any document neither any bond. this company was located in laxmi nagar but now it's shifted in noida. where i am not able to travel on that location, so i resigned in company on 20th jan 2018 then they accepted my resigining letter. on same day, they given me a relieving and hai experience letter. but the salary of 20 day (1-jan - 2018 to 20-jan - 2018 ) is not credit . i asked to head who is head person and handle the salary department. he replied me to credit the salary on 5th feb. then i replied ok . i called him on 5 then he said i will do by 10 surely. then i said ok sir. but krr dena. then he extended date to 15 and then 18. and now he is not picking call and not replying to my msg and called HR she is not picking call as well. then i called one employe in company and told him to please can you connect me with HR then i talk to her and then i asked why you are not picking call she relies "phone dur rkha hai isliye uthati nhi." this is type or organozation. i have all the proves of head in which he is extended a salary date i have all call records and messages. amount of salary - 10,000/ - i know this is not big amout for todays world but this ih huge amount for me. please. please suggest me ASAp.