You have not replied to all points e.g; : Have you consulted your own Labor Law Cosultant/service matters lawyer? If yes what is opinion of your own counsel? Did company issue Form16 to you?
Are you aware of an able counsel at Pune?
You have posted that:
>>> "I'm not a member of any trade union or such kind does not exist in most of IT companies."
It is not true!
There are IT/ITeS employee's unions and trade unions have embraced them.
Such matters are best resolved at union plateforms.
There are threads at LCI in which employee's have confirmed that the employers/HR were quick to resolve when unions intervened.
It is not neccessary that each company should have its own employee's union.
However employee's in a company can form 'Works Committee'. Read ID Act
Employee's in a company can form IC.
Shiv Sena had formed cell for IT employees.
State Governments like Karnataka has notified to form 'Greivance Redressal Commiittee'.
>>> "My recruder send an email regarding the issue and asked me to contact HR and get it approved. As per email they conveyed, the previous company send a quick email stating that they do not have such records of that person."
It is believed that you had provided c opies of 'offer letter, few pay slips and relieving letter ' to current employer, and above mentioned response of past employer was to such documents.
If the documents with you are legitimate the reply of past employer may amount to falsification of record.
You may try by obtaining the registers prescribed under ( State where past employer/controlling/disbursing office was siuated) Shops & Estbs Rules from Inspector appointed under State Shops & Estbs Act, and even Inspectgor appointed under THE PAYMENT OF WAGES ACT........................
>>> "I could not able to communicate to HR, since not having email id."
The email id should be on offer letter, website.
>>> "Communicated to Director through polite humble emails."
The director must have forwarded to designated HR personel.
In any case thru Director employer/HR stands informed/noticed.
You can send notice thru Redg. Post, followed by scanned copies thru email.
Obtain POD from PO.