You have posted that:
----“Few days ago...had a con-call my HOD, HR HOD,, As per them... Operation (revenue generation dept.) is not happy with my services to company...”
Did you record this con call?
Keep Smartphone with features that would record all calls (incoming/outgoing without any beep or sound) e.g. True Caller and arrange to record now.
The dictum of your BOSSES is not allegation of ‘Misconduct’ due to which employment can be terminated without notice/pay.
----“Hence put down your resignation and consider your notice period start from today itself for a month.”
The demand of resignation can be termed as offence…………………..as well deemed termination.
----“Due to pressure I putted my resignation, Asked last date would be after 2 month to my line manager through email (Without digital signature) Resignation is not accepted yet.”
It is a time tested trick and you have also fallen in trap.
If notice period is 3 months and you have tendered 2 months you are liable to tender notice pay of 1 month.
The acknowledgment /acceptance of resignation is not issued deliberately.
It is always better to tender resignation by letter thru Redg. Post and obtain both POD and certified copy of run sheet of postman from PO.
You can withdraw the resignation before it is accepted.
Company can not accept the resignation before the expiry of notice period tendered by you.
----“I don't want to leave company until unless either 3 months time of advance 3 months compensation cheque.”
As already pointed out above since you have resigned you are not liable for any compensation.
Employee should never act in haste and must consult elders in the family, competent and experienced well wishers, lawyer/law firm before acting on his own.