oh no!
I just lost a little gold dust molly, she looked exactly the same way. Taill all crooked and barely moving. It seemed like a sizue, and she recovered from it for a few days, but died a week later after it happened again. It was really heartbreaking.
I'm by no means an expert, bt from what I read after she died it may be tuberculosis.
I hope your's recovers, shes sure a beautiful looking fish (silver lyretail molly?). You might try that Tea based formula and some salt in the water.
Good luck, I know how you must feel.