Jaquar — To Return of Jaquar I Flush which is old, has rusted parts and bad reviews online

Based in Mumbai, Vile Parle East. We bought the Jaquar I Flush along with other Jaquar products from Mayur Plumb Centre (Vile Parle East) who said to us that they were an authorized dealer for Jaquar. Meanwhile we came to know that the I Flush has bad reviews online and also the parts of the I Flush were rusted and old. The I Flush given is manufactured in May 2018.
Now when we want to return the product the Mayur Plumb Centre says that they are not the dealer and had ordered it via via from Shivam Ceramics (Vile Parle East) which is the dealer for Jaquar. But Shivam too is not agreeing to take the I Flash back saying that Jaquar does not takes it back from them.
We need Jaquar to take this I Flush back via the dealer or directly.