You have posted that:
"They didn't give me experience certificate and relieving letter because I had not completed my 6 months (provision period).
So I can ask for it after 2 years?"
Is it stated in any document issued to you and signed/accepted by you e.g. appointment letter and any rule/policy mentioned in it?
There is NO rule/law/decision/pronouncement etc, atleast in my knowledge that lays down such condition!
What was your designation and anture of duties?
How many persons were employed in it?
Does it have an office at your current location?
Does it have its certified standing orders that apply to your designation or do Model Satdning Orders apply?
Relieving letter signifies that nothing is due from employee.
You have worked for app. 4 months.
At the most they can adjust notice pay while computing earned wages, bonus,leave encashment, OT,Incentives,reimbursments etc in FnF statement and supply it to you for acceptance.
It has already been posted the documents that you can demand and are to be supplied by employer.
IT companies are covered by Shops & Estbs Act ( MP Shops & Estbs Act in your case) and notice period ( for employee and employer) shall be as per length of service and as inserted in this Act and provisions of the ACT shall prevail upon appointment letter.
Employer has to submit various registers as provided for in MP Shops & Estbs Rules and in such registers employer has to enter DOJ/LWD etc.
If you are unable to resolve on your own, entrust to IT/IteS/Female IT employee's/Trade Union leaders,and an able labor Law Consultant.
