Distribution of KALISZEWSKI in Poland:http://www.moikrewni.pl/mapa/kompletny/kaliszewski.html
Did not find any BENHAGEL.
Were your ancestors Polish or German? If German than maybe the surname should be in German spelling.
Take a look in LDS-Mormons [Family History Center] site if church records of Clausdorf West Prussia were filmed and indexed. I suppose the first thing to do is to establish the spelling of the town. Is it Clausdorf or Klausdorf?