Microsoft — still not given my phone from company,old ear phones.

Address:

Guntur, Andhra Pradesh

i have bought new microsoft lumia 640xl.within 20 days many problems have been arised from my phone-head phones are not working properly, white dot on the screen, charger easily gets heated on charging, using the phone for more time also makes it more heat. so i have given my ear phones in nokia care centre, after 1 month they have given my head phones which are not good, they are old ones, there is nokia company on that head phones but i have bought microsoft. even i have given my phone in service centre about 15 days back, but still i did not get it. then what is the use of getting new phone. now i dont have any phone to use.