My mother dies

At my mother's lung cancer 4th degree. Last year was a breast cancer 2nd degree, did the operation and several courses of chemotherapy. Now the doctor has appointed her palliative chemotherapy. Free medicines but also for such chemotherapy are not. Appointed three courses, the cost of one course of 500 dollars. Unfortunately, at the moment due to a long battle with the disease, no money and a lot of debts and credits. Please help.