Hello to all, I received this serissa as a gift in September and tried to do everything I mostly red here or in the book about bonsai (it's my first tree). It was always green, without marks of overflooding. I kept it on a window from the inside, not too much/not too less sun, temperature about 10-15 Celsius. This happened in 2 days and I really don't know what I did wrong or what could happened. Please is there any chance that this may get better? To be honest I am very crushed with this state, also the brownish part at the bottom of the trunk is new, not sure why it is there Thanks in advance for any help!