Who called from 5878871936

this person has  called on more than 1 occasion and won`t state the nature of the call. feel I am being phone harrassed.

Calls me almost daily

Keep  calling  and  never  leave  any  message.

Asked for a specific person, but wouldn't end call when advised it was a wrong number.  Asked for the reason for the call and were told it was for a political survey.  Very odd when there are no elections going on at the moment.