Motorola Solutions — Product damaged by service center. submits by one month. till I'm not geting any valid response

Address:

Bangalore, Karnataka

I bought moto g 3rd gen on[protected] from flipkart. It has hitting proablem and i take it to kolkata maliktala service center (wireless communication-55, Malik tala main road-kolkata700067) on[protected] regarding this issue and submit it. When I first time go to there they at first check my phone and ask me to submit for 15 days. I refuse nd told them I haven't backup yet...I will in next day. They give it after 20minuit and I take it to my home and after I follow that my two speakers are not woking prooerly it was too noisy and a blue scratch in on the left side of my display. Next day on 11th march I told them the proablem and they take it and give me a manual job sheet. After 15 days I contact them and they ware not done yet. And after few day on[protected] I went to take my phone...when they provide my phone it was full black on display.display not working...nothing appare nd they resubmit it On that day..not even provide an another jobsheet...they give me the old one. Till now I have not geting any valid responce from the service center they even not recomplain it and fail to provide me a new jobsheet no today is 5th may..[protected]. Now tell me what should I do. My old jobsheet no is GWT/MG/16/00074 IMEI NO [protected]