Amaron — home inverter - very irresponsible customer care

Address:	500094
Website:	www.amaron.in

I have been using amaron xenon inverter at home. I had a problem with the inverter and called their customer care for service. On 13th october 2017, they have registered a complaint and provided me with a sr number on my mobile as a confirmation. And they have also sent me another message with the service representative details who will be visiting.
No-one turned up for days...
After some time i have called them to enquire on my service request. The customer care representative was so irresponsible and told me that the request was closed as the number was not reachable when he called. This is so disgusting. Mobile network issues are quite common and it happens to everyone o[censored]s. Sometimes numbers are not reachable due to network issues. Should the service request be closed just because this number was not reachable at a particular time? Does this sound reasonable?...
If the service request is closed, while on earth i will know that the request is closed. Should they not send me a message to let me know that the request is closed?

When i called them and questioned the same, the representative was so rude and told me that "it's like that only and do whatever you want". All this is just for questioning why there was no update and how will i know the request is closed. Is it not their responsibility to let me know that the request is closed due to so and so reason?

I have also called the corporate office of amaron and spoke to a senior officer of the company. He also justified that the complaint will be closed if the number is not reachable. And then i have told him about the experience i had with the customer care representative and his irresponsible and disrespectful behaviour with the customer. And i couldn't find him show any concern about the way their customer service is behaving.