I came here on 2022 September for environmental technician programme which study permit valid until 2024 September, but I switched to general arts and science on 2023 Jan but I didn't attend class due to health problems and I didn't give exams and then it was vacation time for 4 months after that I didn't return to college on 2023 September .college reported to ircc that I'm nor longer as student, but now for this 2024 Jan I wanted to join back to college ,but they said my study permit is not valid...what I will have to do please help me