Eureka Forbes — Cheating by Service Center

Address:

Fort Kochi

Bought NEO UV+UF purifier on November 2022. (Our house is locked and nobody is living there.)
6 months free service was requested but no service guys called or came for the service.
On 10 November 2023, just before end of warranty, service technician called and my brother opened the house for the service guy.
On 20 January 2024, I visited the house and saw the purifier is not working. Booked complaint and technician came and said PCB is dead and needs paid replacement.
After raising many service requests, which were automatically closed, I became suspicious and opened the purifier and noticed that the PCB had been replaced with a very old and dirty one which is not even compatible with the NEO product.
All complaints to Eureka Forbes goes into deaf ears with the same automated reply that a technician will call soon.
Shouldn't a reputable firm like Eureka Forbes take action against their Service Center for deliberately cheating customers and spoiling the name of Eureka Forbes?