To me, the post seems to be incomplete with an one-sided perspective.
The post begins with the sudden termination of the employee by the employer without any reason. If so, why the employee waited for two months that too only to ask for his F&F settlement and failed to agitate against his alleged termination?
Then the reason for non-settlement of F&F dues comes through the mouth of the HR. From this it is discernible that the employee would have possibly failed to serve the notice period before his leaving on resignation. Combining the entire information given in bits and pieces by the poster, one can understand that he was treated as an absconder and consequently his services were terminated by the employer forthwith. Whether the process of such a termination is well within the rules of procedure in tune with the principles of natural justice becomes out of context as the remedy sought for in the post is settlement of F&F dues only. Without relevant particulars like the nature of post held by the employee, total length of service in the organization, EL at his credit etc., I think it is not possible to answer the query.