Who called from 3863103792

They keep calling me and don't leave a message. Guess its a marketing call

This call is from Wakanetwork.com which us a scam. I have filed a police report and contacted the local news channel.

They just started to call me. do u know who they are or what they want??

They called on 1/9/13 stating that I registered for a give-a-way from Walmart for an iPad. I informed them that I never signed up for it. They requested information. I told them they had wrong person. They stated they were sorry and hung up.
The number called again on 1/10/13, but I missed the call and no voicemail was left.

They call at least twice a day, sometimes 3 times. No message. How do I stop the calls?