@FarnazKamyab I think you meant for this to go to your school's admin and not be posted here. This a global community of all the Canvas users around the world (such as yourself) and we do not have access to your system to help. I am an Admin at my institution and there are ways for them to force the submission if it is stuck. I have had a few students recently, especially with New Quizzes, where the submission does not go through and I have gone in a forced the submission. Sometimes it is as easy as acting as the student and sometimes it has to be done by API but it is possible. So, I recommend contacting your institution Canvas support directly and not through here.
Good luck and hope this helps!
-Nick
