Have had the same problem as others reported here. Does anybody have an answer.

i get calls daily from this number. it is a debt collection agency. all i say is hello and no one responds. it comes up in caller id hadenfield, nj. no company name. very sneaky indeed. MRS Associates. they keep on calling. there is no one here with any debt. so ridiculous.

These people are criminals.  They use tactics to stalk people even if they have no legitimate reason.  Who knows what they are doing because they wouldn't be acting like this if it was legit business.