Salary Issue

Myself Rajeev saini, I have salary issue with my company. Actually i worked for an web design & Online marketing company name Tech Dk located Laxminagar, Delhi. I joined this company in January 2017 as SEO Specialist and worked for two month for the company but this company have not provided me any appointment letter at the time of joining, I asked it for so many times but they have not provided me but they given me salary of January month but they have not provided me the salary of February i.e my second Month, currently I resigned from the company and completed my notice period but they have not given my salary I asked them so many times on phone and I also went to office to collect my salary but they always procrastinate they have not received payments from their clients so they are unable to given salary. Please advise me what I should do to get my salary. I have only an Email id by which I communicate in company and my boss number I.e [deleted] and the first month salary check number and account statement of bank as a proof that I worked for a company.