Coolpad India — Network issue and service not provided free during warranty period

I have purchase coolpad cool 5 mobile in the month of jan 20 from amazon site. After that i face issue of network and handset get extremely heat.
When i approach the service center he will ask to pay the charges and ime no not register on site. So contacted to amazon customer care, but they are not providing support to resolve issue.
As govt court they are just giving dates from last 1 month.
Coolpad india is also not responding on the issue mail. There contact no are also not responding.
Pl check and take hard action against them