Calla lily flowers curling up
When I first bought my calla lilies, the shape of the flowers were in the perfect shape. However, recently the flowers curled up while the color appears to be perfectly normal. The leaves are all green and normal too. What does that indicate to me? It is kept indoors at room temperature and it is placed to get morning sun from my window.
I do think your plant may need a little more sunlight.
I would look for a sunnier location for your plant to grow.
Here is a link with care requirements.