should Muslims believe in Pir's?

[CE]

@SargeCandy

The pir had some knowledge that he could find out things but couldnt give a solution.
The amil(pir) has jinns and moakils in his control which tell him about anything that u ask about a person.

these amil pirs u speak of, are we meant to believe in them? if so how can tht be when communication to jins is haram in Islam?