AO Smith — dead - not working

Today i lodged a complain regarding non - functioning of the jaguar water heater and in response i got three calls from three different numbers with the instruction to give the debit card number which is prohibited as per the rbi rules and the rules of the bank concerned. The person saying the manager insisted me to give the debit card number which is a matter of surprise. I requested them to divert my complain to the local service centre with the instruction to depute your technical expert to visit my place and sort out the problem. Instead of listening to my words he disconnected the call. Pl. Look into the matter and kindly take steps to sort out my problem as per the data provided earlier. Regards.