mobile handset not received yet

I purchased mobile of micromax on 13-05-2014. after using one month it troubled me and given to service center on 14-06-2014. They send handset to company for repair and gave me time for one month. Now it is 2 months till i did not received my mobile. I asked them for status they gave reply as priority service on 30-07-2014. bull till now i didn’t receive any sort information about my handset