Firstcry.com — Faulty product provided by firstcry

I have purchased toyzoy mapple tricycle with parental handle on firstcry. The product is faulty as when I go to assemble the loose parts of tricycle I found that it is of different sizes than usual, so it is not possible to assemble it. I talked with customer care but they are so irresponsible and lying that our team will call you back, will provide resolution today, tomorrow but they haven't called me yet. I have to call again and again but are not interested to provide resolution faster.