In the absence of any agreement, there can be no such conditions to be implemented.
However you should confirm the fact that there should be some arrangement for taking up this assignment between you and the team outsourced your services.
You verify that if you have signed any such terms that requires you to serve the notice period as demanded by the manager now.
If ther is no such agreement or condition,
You may take up this matter by a representation to the top management and demand the relief that is due to you.
If there is no response or remedy to this from the management side, then you may issue a legal notice demanding your due salary.
If this fails to revoke any proper response, then you may vie the feasibility and assess if it is worth to file a money recovery suit to recover this amount and proceed