Such gorgeous leaves! I killed 3 of these plants and then gave up. (I've been told that until you have killed 3, you haven't really tried to grow something LOL.) I did note that the bright light through a south-facing window was too much for it (leaves got burnt and crispy around the edges). Can't tell if yours has curling leaves due to root rot from over-moist soil (plants with root rot look dehydrated, which has the counterproductive effect of making people throw water on them)... or if the leaves are curling in an attempt to avoid too-bright sun. I'd move it out of direct sun while it's recovering, either way. Good luck!