I receive a letter from Global test market. I called them and talk to someone, but I lost the call. Now I can't get in touch with them now. I been researching and people are saying it's a scam from the company. I hope it's not a scam. If it is I will want my money from them. What should I do from here?

I hate to admit it but I was scammed and this is the phone number involved.  I am trying to gather enough info to help get this matter straight.  I don't care if they are prosecuted or persucuted, I just want their hide or my money.