I just got a new bike and unfortunately fell off it on the first ride, now the lever to change gear for my derailleur Mezzu Microshift is stuck in the position it would be if you had upped a gear before it returns to normal, and cannot be moved, is there anything that can be done?
The bike has a flat handle-bar, two levers below the handle-bar level, I think the shifter is the standard one for the derailleur its a square one that sits on the flat handlebar.
The gear down lever works fine.
Stock photo of TS39 right-hand "thumb tap" shifter. https://www.microshift.com/models/ts39-29/