In your first post you gave a version which slightly contradicts in your second version. If he is impotent, and you are sure about this particular fact, then the legal remedy available to you is to file annulment case against him and move away from his place of residence and live separately. In this case, you will not get any maintenance (in exceptional cases, some people during annulment cases got interim maintenance). It is different to divorce. You cannot plead that this marriage is a forced one. Because, at the end of the day, even though you did not like, you married him. In law, forced marriage rquires some thing more than what you described. Hence, my suggestion is move annulment petition by engaging a good and expert advocate and get relief.