Unhappy [Q] karbonn titanium S1 Not booting, no signal, no screen light. (QPST)

hi everyone,
i was trying to root my phone... but accidentally i boot my phone and then i press volume up and down key. then message was prompt that QPST download mode in my phone. then on my laptop message was prompt that you have to format this then i do format. after that my phone not working. i pressed power on button but my phone is not booting up nothing i can do with it. and i went to karbonn service center but they said it can not be repaired.
please help me..