Good morning, @ANIRBANBELL412 ...
Unfortunately, Canvas Community members wouldn't be able to help get you access to your past course. This would be something that you'd need to discuss with folks at your school where you took this course. If you can reach out to your instructor or your school's Canvas administrator, that would be best. Or, you might see if you can have a conversation with your school's Online Learning / eLearning / Distance Education department. They might be able to assist you as well.
Good luck as you have conversations with people at your school. Let Community members know if you have any other questions about this...thanks!