RICHLAND HOLDINGS , INC wage garnishment without any papers or information being sent Las Vegas Nevada

This started when I recieved a bill from a dentists office for $682.83 around 6 months ago (radiant smiles on w, sahara ave) for part of a dental treatment that my son had done around 4-5 years ago, when I contacted them and said that all monies due for his dental work were all paid for at the time of treatment, they insisted that this amount wos still due.I informed them they were incorrect and I was going to contact the B.B.B. Soon after that I got a letter from a collection agency (richlands holdings,4955 s,durango drive, suite177) demanding the sum owed, recieved many calls from them demanding payment. 

Last week I received a short paycheck and discovered to my disbelief that my paycheck had been garnished !! $414.91 taken from my paycheck without any notice given to me regarding any law suit, judgement or any information sent to my home or work. Received a copy of the judgement couple of days ago regarding who the company is and what it was for and stating that the bill is now $1811.77. I had not been informed of any legal proceeding against me and had no idea any court hearings or judgements were ongoing, only found out when I received my garnished paycheck.