Complaint Review: Marketest Consumer Research

I received a letter and a check today from MARKETEST CONSUMER RESEARCH. The check was worth $3,981.71, I called the bank that it was issued from and the bank said that it is a scam. The postage on the letter is from Canada. I have called several times this company and there has been NO answer and no one has called back. I knew right away that this is a scam because I had never signed up for anything like this.

Nkneale
Mt. Morris, Michigan
U.S.A.