I am trying to implement Product exchange functionality where in case customer order for wrong color/size, he can request for correct one to admin.
In this case, I would like to let admin change status of that product from Shipped to let's call Exchanged and then admin can put new order on behalf of customer for correct product.
I am not able to find code to change order item status. I can find code to change Order status but that's not required in this case.
Any idea how to do this? or any easier way to implement this?