This phone number 312-798-6910 called me at 11:40 trying to sell me a time share and when I hung up on them, they started calling and letting the phone ring once, then nothing.  The same day the phone rang at 12:10 and then again at 12:35 = all three calls in the same day.  Next day the phone would again ring once and then nothing.  This has been going on now for three days..! Now today at 12:35 and then at 13:40 - 312-798-6917 number did the same thing.  These people need to be stopped.