Sony Xperia — My phone was in grantee but after that they have also charged

Address:

Gautam Buddh Nagar, Uttar Pradesh

I have buy c4 which is just 15 days old I have taken it to service center but they have charged 5000 for that and I have taken my phone after giving 5000 but after giving also 5000 my phone has been not working properly and whenever I get a. Call and phone display go and no one can switch on it...