Sony India — Power button got repaired and again damaged

Address:

Nagpur, Maharashtra

I use Sony Xperia M dual and it was purchased on jan 27 2014. I live in Nagpur city and so thus I go to the Sony Service Center and put my phone for more than 7 days as it has problem that power button was not working. The phone was ready anf get hand over it towards me. And now just after 7 days the problem become same. Kindly help me