I have a medium Fukien Tea bonsai (approx. 7 inches tall) that I purchased 3.5 weeks ago from a department/chain store . At first it thrived but now it is losing leaves rapidly. The remaining leaves are wrinkling and drooping. There has not been any sunny days lately. I am worried about my tree. I placed it under a Sunbox 2 days ago for artificial light and there has been less leaf loss, The soil is moist but not saturated. I occasionally mist it with water and am using a humidity tray (pot is not resting in water). I talk to him and provide soothing music. PLEASE help me save my bonsai. Any information or comments are greatly appreciated. Thanks!