I received lots of calls from this number but no voicemail was left.  Then I answered the phone they asked for someone else, and said they were "returning a call".  I said wrong number.  Two hours later they called back with the same story.  Sounds fishy to me, but maybe they really did just have a wrong number.

they keep calling after I ask them not to

Received call.  No voicemail left.  Thanks Patty Dunn for the detail.  If it was Direct Buy, I know I gave them my number a month ago.  Not happy with these calls.

They wont stop calling me