[Resolved]  IFB — neptune dishwasher annual maintenance contract

Address:

Ashiana Garden, Sonari, East Singhbhum, Jharkhand, 831011

On 25.10.2008 I bought a Neptune Dishwasher from IFB. After its warranty was over, he Jamshedpur office of IFB approached me for buying AMC. Since then I have been renewing my AMC regularly. The last AMC was valid till 31.05.2019.
However, this year the IFB office did not directly approach me for AMC. Instead, I got an SMS on my registered mobile saying: "Your IFB Product's AMC is expiring this month! Enjoy 10% discount on Annual Maintenance Contract. Reply AMC24 to [protected] to grab this offer."
I promptly sent the required SMS to the above number.
However, nothing happened after that. When I approached local IFB office, I was told that from 2018 IFB has discontinued AMC of NEPTUNE Diswasher.
My question is how can a reputed company like IFB discontinue maintenance support for a regular product like a washing machine for its loyal customers "without prior notice"
Also, in the event, how can the company then send false SMS to a customer to renew AMC.