Eureka Forbes — Fake free service-Technician Spoiled my water purifier on the pre text of free service

Service #[protected]
I got a call from a eureka Forbes technician regarding a free service for the water purifier. Even though I initially declined, the technician told me it's free and useful for the purifier. The technician was not wearing any uniform or carrying an ID when he arrived. When I asked for one he showed me a service request on his phone instead. He was here for 20 minutes, and after he left the water purifier started to overflow, and now has stopped working all together. This was 3 days back. Even after multiple calls to the customer service, no one has resolved the issue till now. Why service a machine if you don't have the parts for it? This is a scam. Local recognized service franchises send unskilled technician for easy revenue generation. Extremely disappointed with this racket.