I have submitted a manuscript to a journal. After submitting it, I found mistakes in the manuscript and corrected them. I tried to send the revised version of the manuscript to the journal, but it is not available. I tried to withdraw the manuscript, but that seems impossible too. Under this situation, is it appropriate to submit the revised version of the manuscript to another journal?
I am not sure if the original manuscript is under review since the status is "submitted to the journal" for a long time.