Your advocate has to first withdraw the Vakalatnama (NOC) and then you can proceed to go as party in person.
With an advocate on record, although on certain occassion court may be liberal in allowing you to be heard, but eventually the Adv on Rec representation will be final. Apart, the opposing counsel has the right to and will object to your way of representation i.e both you and counsel.
Irrespective of any Act, this is the Court Practice and Procedure.
Bala Srini FCA., LL.B.