Dent-a-Med Inc review: I got letters about my debt

Scam. Couple of weeks ago I got the letter and form from Dent-a-Med Inc. There was mentioned that I owed large sum to this company. I didn’t believe in it, because I haven’t heard about them. I got the next letter, which was even more dreadful and they said that we would meet each other in court. I am seriously scared and don’t know what to do. Help me, please.