Hi Sumit,
I have suggested you to visit your office and find out what is the status of your position. Having received salary it's evident that you are borne on their pay roll and for all purposes you are employed there.
You need to know whether you can continue to work there or otherwise. Then only you'll be able to decide. How about EPF A/c, have they opened your a/c or not.
The fact that your official eMail ID stopped doesn't mean you have been removed or so.
Even if you are treated as separated there should be a logical conclusion of this position. What were you doing all these months, almost all factories, unit have resumed their operations, partly or fully. Now, in Phased-4 more relaxations have been announced, inter-state & intra-state travel without ePass has been allowed. Why you are shy of visiting your office and find out. If they allow you to resume, make up your mind, whether to continue or not, then only other things will follow. What docs you have is fine. Have you tried for a new job & got it in the interim say 4-5 months?