Eureka Forbes — After Sales/AMC Services not provided

I have been requesting for filter change for my RO for 2 weeks but no proper response came after I extended my RO warranty. Before extending the warranty I was assured by company customer executives and technicians that I would get services fulfilled within 24-48 hours but after extending it feels like a scam. I have been requesting a tentative date but still, that was not given. Now the customer executives are not picking up my calls.