Consumer Redressal

i had renewed my annual maintainence contract with Elegant Water Trait for my Kent Ro Water Purifier. They took 3500 rupees for one year but since then they have not even come once and not even answering calls. I went to their address but they have moved out of the place. Their address is 162/A?98 Lake Gardens, Kolkata 700045. Phone numbers 9831339237, 9830149159, 03365008863, 03364599294. Beware of these people as they are cheaters.