Someone closed my email account and I can not open it I do because I have important documents in my mail, help!

Two months ago they closed my personal post office and my facebook, a direction recovers my facebook but me it is impossible to recover my post office and in them I have important information, on having entered it puts his gutter of not existing Microsoft, I did not put alias nor realize any alone change simply one day already I could not enter, I need help to recover them and if it is necessary to fill algun form or letter with taste hare.