calls leaves no messages

Getting these calls repeatedly- after work hours.

Called, said "Heeheehee" and hung up.

Called and when I answered they hung up.

Called, asked for my husband by his phone book name; said he was from a law enforcement agency. My husband said, no thank you; and hung up.

Called tonight...hung up...tried to call it back..."normal ring tone" then went to a ring that sounded like I was "London Calling"..then went to FAX machine.

received a call tonight asking for my husband by his first name, I said yes he's in may I ask who's calling and she hung up on me how rude!

Called me tonight, didnt leave a message. Called back, and all I got was a sound like a fax machine....

888-775-3577 calls all hours and when I answer they hang up.  I am on do not call list.  Partially disabled and find it very inconvient to waste
the time to move about and no one there.

Called last night and I told who was on the phone, to take my phone number off the list.  He came back and said "NO NEVER!" Then hung up on me.  What a fruit cake!!