Jaguar — Geyser Replacement under Warranty

I bought Jaguar Gyser and installed in my bathroom. After 4months of installation the gyser starting leaking my society plumber found that the leakage is from the inner drum of the gyser which is damage. It was later verified that the only fix is replacement of the gyser. Raised online & offline complaints to Jaguar and even they were approached by the society but no response. Person incharge mobile number [protected] initially called and asked for several documents, I provided all and now even he is not answering my call. Pathetic after sale service from Jaguar.
Request your kind intervention to reslove the issue.