Am I done for?

My father in law used to care for this plant that I had gotten from a family member’s funeral I believe its a Calathea Roseopicta. It had one leaf that shriveled up from the cold so I cut it since it seemed like a loner. I’ve been watering once a week and misting it every day, its by a big windowed door but no direct sunlight, and I’ve been giving it some instant plant food. Am I done for? Cause it looks like its dead 😅 any advice would be appreciated