Symphony Limited — not attending complaint

Address:

530018

My complaint dated 25th july 2018 has not been attended but cancelled again by the symphony today with a message "dear customer, your service request vz[protected] is cancelled for ringing no answer. For assistance pls contact symphony at [protected]."
I have given my alternate contact number to ensure that no calls are missed. Today i proved again that the so claimed to have called me never ever happened. Not even single call received.
I request to the concerned to take immediate action on the erring person and depute technician to attend my defective symphony cooler during the summer season, please.