You have posted that:
1. --- "Then My Head directly told me on 19 NOV EOD I got email 20NOV is my last day in company."
Before you got this email did you decline in writing to go to Vadodra/Mumbai?
Did the HOD mention in this email that you have declined to accept the assignment at another location as a reason?
If NO: then there is aparently there is NO record of declinature in writing!
In such case you might have specific merits on your side.
Your contract specified notice period of 90 days and probably in notice of resignation tendered by you................you have mentioned the notice period/effective date of resignation/last day in office......
You had served 58 days out of it and company has in other words chosen to terminate you and in such case company should be liable to tender notice pay for full 90 days to you @ Basic/Gross/CTC as stated in contract of employment/appointment letter................
----"Next day i got email from HR i have to report mumbai for the assignment, i replied with my problem I am not able to work from mumbai, but ready work from pune. End of the day 20 NOV i got email from HR today is last day."
Before the email from HR the last day was already communicated by HOD....................as 20th Nov.......and HR seconded it.
Since 20th was already recorded as last day therefore HR can not ask you to move to Mumbai after/on 20th.
2. "I have denied to work on outside Pune location projects/assignments."
Did you state so in writing before or on 19th and in addition to it before the time of email of HOD?
If yes the management may treat it as indiscipline/insubordination/misconduct etc.................
It was 4 weeks (28 days) of assignment that would end well before expiry of notice period (90-58=32 days) and it was not a transfer.................
Do you have printouts of all emails, and also HR policy/Service rules and regulations/Conduct and discipline rules stated in appointment letter............................If yes it is good or download the soft and hard copy?
3. "After serving 58 days from notice period , On 19 Nov 2014 I got email from Head i have to move to vadodhara for 4 week assignment. Which is totally new and not related to my project work as I did till date in company."
Did you mention it that the assignment is not related to the project work.............................and /or did the company offer to train you for it...........................or did you ask for the training/familiarisation?
Since company has terminated it can't deduct basic pay and has to pay wages till last day in office...................say 20th.
You may show the job advt.,job application, interview call letter,selection letter, offer letter,appointment letter,HR policy etc, all emails on record to your able Labor Law Consultant,Service matters Lawyer, and proceed further under expert advise of your counsel.........
Your counsel may submit a well structured representation from your side to good offices of appointing authority,MD and agitate that a very harsh penalty of termination has been awarded and your excellent work record is being spoiled by negative comments in relieving letter and personnel file..................just for appraising the superiors that you have family issues and project assigned to you is not in line with say work to be done by you.............................and you were already to be in the company for 32 days more.......
The employee should be vigilant as some over enthusiastic ,zelous,HR/Line Manager out to prove and show his/her metal may abuse the power and authority and put the employee in deep trouble......
If good offices also do not provide any relief then you have the option to approach employee's/trade unions, courts of law,lawful authority and your counsel may ask you a set of structured questions and may opine that designation alone does not decide ...........................and you are covered by the def. of 'Workman' as in ID act, 'Employee' as in Shops and Commercial Establishments act and can approach Inspector appointed under Shops & Comm. Estab Act ,O/o Labor Commissioner and curt of law................