I would use FL CHNG this is the most appropriate use at 3000' AGL, also bearing in mind that TOGA will not engage above 2000 RA.... thats besides the point.
NG FCOM
With the A/T Arm switch at ARM, the A/T go–around mode is armed:
• when descending below 2000 feet RA
Classic FCOM
With the A/T Arm switch at ARM, the A/T go–around mode is armed when
descending below 2000 feet RA, with or without the AFDS engaged.
However around 1000 AGL I would still use TOGA even if the missed approach altitude is 2000-3000 AMSL (aerodrome based around sea level)***then ask for the appropriate pitch mode*** as required for the situation, bearing in mind the GA situation could have 100 different situations so it is dynamic