Lenovo — Suddenly stopped working my, lenovo A5000 mobile & not respond to ur authorised care centre....

I'm purchased lenovo a5000 atleast 1 year, but suddenly stoped working, then I visit ur authorised service centre in latur, but they r not give sutaibe response,
where I can solve my problem, ur care cntre is not working properly,
how to restart my mobile? where?

I m sadashiv s patil makni thor tq nilsnga dist latur, now a days my mobile is as a dead pice, so suggest me what can i do for it, your care centre doesn;t handle this... so, i request u, either repair my mobile or should be give me new pice ...my cell no. is [protected]