Undefire, TOGA will engage above 2000 ra if you have any flaps down; in the above case if atc ask you to go around you must follow the missed approach procedure, so continue descent to the missed approach level off altitude following the missed approach lateral path. In this scenario atc probaly would request to discontinue the approach giving a different clearance, anyway Analyser, if you push toga without setting the altitude above the current altitude, ac simply keeps climbing until you do something.