Who called from 3216733512

when I answer they don't respond
tried to call them back and get a message "call cannot be completed as dialed"

I answered and no one was there

Didn't answer, but didn't leave message, either.

Got call from 800 776 4600 at 12:17  also today. I am not under any kind of debt problems.

Same thing here. No message left and when I calked back, it said call couldnt be completed.