They only come at the time of the AMC renewal. Apart from that they never come.
Pathetic service staff.
The product went through almost 6 iterations before it was fine. pretty pathetic on the service. I have almost had 4 renewals of my Zero B RO water purifier. But the bangalore service is really bad.
The Product by itself is OK. I have been trying to reach the escalation centre, but they are also all the same.