Lenovo — Mobile at lenovo service center from last 2 months

Lenovo Smart Phone Model: P780. Out of warranty. At the start of Aug 2015, I faced frequent switching off of my lenovo mobile, so I submitted my mobile at the Pune service center. They repaired the mobile and called me to collect the mobile. I collected the mobile on 17th Aug after paying the amount 1650/- and again faced the same problem. I submitted the mobile again at service center on 18th Aug, this time they said battery problem. But I never faced battery problem, it always worked for 2 days after full recharge. Since then till now I haven't received my mobile from the service center. Whenever I am calling the service center they are telling that they have ordered some part for replacement in my mobile and it is not yet received. If my mobile cannot be serviced soon, please provide me a temporary replacement mobile for usage till the time my mobile is repaired. Or please give me a new replacement mobile.