I am also in MN - just got a call from them on my mobile. I ignored it but they left a message that I chose online to be a part of something or another in which I would receive a gas "voucher" and Walmart gift card for participating. I KNOW I DIDN'T so I don't know what they are talking about.

Please  find  the  company name and  address

I didn't even answer, I just ignored the call.

keeps calling my cell number

I live in Oklahoma and I have been getting calls too. I just ignore all call that I don't know.