What is the ruling on a woman abandoning prayer and fasting when she experienced bleeding for a month after menstruation, which then stopped after treatment, whether she was aware of it or not?

The maximum duration of menstruation is fifteen days; anything exceeding that is considered istihada (non-menstrual vaginal bleeding). If a girl, after becoming aware of istihada, abandons obligatory prayers and fasting, she commits a sin and must repent and make up for them. If she was ignorant of the ruling, we hope there is no sin upon her, but she must make up for the prayers she missed during the period exceeding her customary days. As for obligatory fasting, she must make up for what she missed during her menstrual days and other days, and her fasting during istihada is valid.