Cat needs help

Hello everyone. It turned out that two months ago I took a kitten for myself and on the second day I saw bald spots. The vet said it was lichen and worms. We were treated for a month according to the doctor's prescription, but the situation only worsened, we went to another doctor and are already being treated with pills, ointment and special shampoo. But unfortunately two months have passed and the cat is still not healthy. Doctors talk about immunity and prescribe medications for the stomach, and at this time the cat lives in isolation in a separate space in the room. I also have the risk of contracting lichen from him , which further worsens the situation . At the moment, I do not have enough money to buy new medicines, go to the vet and go to the doctor myself to check about the lichen. Therefore, for this period, prices are rising a little and here I will post small reports on the life of a cat.