Kent RO — Damage of tank and panel

I have purched kent grand plus in 2018 . After one year local dealer took 8000₹ for extended warranty.Now tank automatically has been damaged at the place where RO is used to hang on wall. There are two cracks at both places. Now local dealer and company both demands additional 1800₹ .
But actually it is not a technical problem. It is manufacturing defect.Clearly body is not so strong Enough to bear the load of machine .Why should I pay for damage for external body. This product is made to hang on hoiks on wall. It is a fraud way to take money from consumers. Please help.