Returning call defaults to voice mail

Called my cell. Did not know my name or even what city I live in. Explained I "won" a 2 airline tickets to anywhere in US and 2 nights stay at Marriot or other hotel. As well as a $50 gift certificate to Olive Garden, Red Lobster. Also stated this is not a timeshare.

Caller asked for me by name, when I said yes it's me, how can I help, she said "oh" and I heard something in background and then she hung up.

Would not leave a message on answering machine.

I have received sever calls from this number and they say "Bueno". I don’t speak Spanish and I'm tired of the calls. Today I decided to play their game, I made my up own language and kept talking. They were speechless

This caller initially called me stating that he was a part of the police department and asked me to verify some information. When I refused to verify the information he got irate so i asked to speak to his supervisor. When I asked the supervisor what was the name of the business they were calling me from, he told me he could not tell me anything unless I verify the information presented. When I told him I was not verifying anything unless I knew who I was speaking too, he became upset and told me "That's not any of your business! Verify this!..." and he hung up on my face. Then called back and left a voicemail.

They called, then imediately hung up. Who does this phone number belong to?

have called call several times a week for the last several weeks, leave no message. and do not speak when we answer the phone. This really has to stop..