This company is charging my cell phone for unauthorized charges. I did not authorized these charges.

I was a free member of this game site. I was allowed to play the daily games to win prizes and points. The daily prizes were $100 I won three of on seprate days. Have not receive the money.And when I call they say it was sent on a certain day and it was not. I was given a number to call on of the supervisor she will not answer the phone or call me back.