Hero Cycles — faulty cycle

Address: 380008

I purchase a hero 16 t cycle from amazon. This cycle is totally faulty. Its go bad every time whenever i repaied. Its bearing broked everytime. Its bearing break 3 times after ride. I want a replacement for this.
I purchased this cycle 28 november 2018 from amazon that time my child is 3.5 years old so he was not ride this cycle regularly.
After 2 months its bearing broked. We went to the hero cycle shop i saw him warrenty but he charged 200 for that. But after 4 days its bearing broked again. Now we again go for repair and paid rs 200 for bearing and its break again. I think it is a faulty cycle i want a replacement for this cycle.
I raised a complaint against this cycle on 24 oct 2019. It's been 12 days but i didn't get a single phone call regarding this. I got only mails that mentionied only we are working on it. Its warrenty will end in this month. That why i want a urgent solution.
I want a replacement of this cycle because my son not ride this cycle because every time its go bad.