Hindware — Faulty Toilet

We bought a toilet 1 1/2 year ago. It never flushed properly. We called Hindware customer service guy. He came and could not figure it out. The second layer came and said, it is faulty and it is a manufacturing defect. The water inlet is suppose to be three inches here it is 5 hence does not flush well.
It has been fifteen days and Hindware could care less to do anything about it. It is totally stuck in a red tape because no one knows their job hence do not want to take the responsibility.
How does a big manufacture have such a worst customer service and make such defective toilets and sell it to the public for such a high cost. Do they even have a quality control department. It is not a rocket science, it is making the toilets. I am sure they have sold millions of these defective toilets to many Indians and no one knows about it.