Onida / Mirc Electronics — No commitment to resolve the defect

Mu Onida microwave has a defect. It does not work properly. The issue is intermittent and very difficult to solve.
My complaint was pending with Onida for 15 days and they just closed it without any resolution.

The technician who was supposed to attend the case went on leave and did not return for a week.
They are not providing any commitment to solve the issue.
They fool around that they will send a technician but no one visits my house.
I opened another complaint which is also not taken up by anyone. I know the mobile number of technician but he is not committed to come and solve the issue.
I regret buying Onida product