Same thing happened here.
I noticed I started A LOT of random calls from numbers that I didn't know, didn't answer, and were most likely marketing calls. I had recently signed up for a godaddy.com account. I went back in and switched my cell phone number to my google voice number (switched my google voice to go directly to the google voicemail). I got a google voicemail email from this number with spanish machine message.
I'm guessing all these unwanted unknown phone numbers that are calling were using my godaddy account info.