Who called from 5749687812

At least 3-4 time a day. Any idea? I keep considering calling them back and telling them to stop calling me but I have not done so yet. This is frustrating to say the least. Esp when I am in class and forget to turn my phone on silence.

A few days ago they called me twice! Left no messages on my cell

I got a call from them today and yesterday. I called the number back and it just said the Verizon Wireless caller is unavailable. I decided to block the number.

I have received three calls in three days from this number. Auto busy signal with a return call. I called from a number other than my phone number.

I got a call from them today, didn't answer and they didn't leave a message.