Ringing bells refunds money to customer, because people does not believe on it . How it is possible. Sometimes ago a company had launched mobile phones in very cheap prize Rs 500/- each. Then nobody said that its scam. Its fraud . On this time the cost of mobile would be very high. Because always new technology is costly.
But in present electronics & technology is very cheap & advance . Every Bhartiye ( Indian) is genius. So give one opporunity to them for prove yourself