1) I hope that you were not at probation during these months, because the probation /training period is not counted as the work experience of an employee , the work experience period starts afterwards. And one is not eligible of getting an experience letter if he/she leaves the job after /during his probation period.
2) Since you were there for a time period of less than a year , you need to review the company's policies..may be they have a specific time period condition for issuing experience letter.I recommend you to always have a copy of the signed agreement with you ,that's our right and proves to be a savior in such situations.
3)You need to communicate with the higher authorities of the company(do not hesitate to go to the CEO level) ,submit your request and keep copy of your conversation with everyone dealing with you in tbis matter from the organization just as a proof making your case strong.
17th June 2019 From Pakistan, Islamabad
17th June 2019 From India, Delhi
You do not have payslip or anything that could prove your working in that company. Substantial proof is required for legal fighting otherwise it is of no use.
You consult a lawyer and send a lawyer notice to your employer, why they have not issued you experienc or relived letter. You have to wait till get the reply to the notice for further move..
20th June 2019 From India, Mumbai