Hitachi — no response to complaint

Address:

41 ,stadium road ,tilak nagar ,auraiya ,U.P., Auraiya, Uttar Pradesh

we have hitachi split ac 1.5 ton . we have never
got any service of machine as promised by dealer at time of
purchasing. however on 29 june 2013 it stopped working altogether, so
we made a request no - [protected] , for immediate attention . Even
calls after calls, no one respond or bother about our need for
repair and service of machine . so now what should i do ?