got a call from advance mediation group, but when I searched on internet everyone says scam. They had my ss# and bd but my friends phone. They said I owed money on a loan I didn't take out but If I pay today, they can reduce the debt. I don't think they are a real collection group but htey have my info, so now I don't know what to do. they call from 2 different numbers, one lady is Denise.