Lenovo — cheating customers

Address:	New Delhi, Delhi, 110011
Website:	www.lenovo.com

Sir, i bought my lenovo zuk z1 from amazon (Imei no. [protected]) on 10th of september 2016 which was delivered on 14th september 2016. After 2 weeks i faced a problem in which front camera was not working and took almost 3 months to get repaired in a servicing centre of manipur. When i got my fon back i faced a problem of heating and battery got drained in few hours only after charging it for 100%. Then again i submitted my phone to care centre of manipur on 11th may 2017. Till now i haven't received my phone. I have been calling to the toll free no.[protected] regularly and the executives do tell me that i will receive a call from mr. Abdullah. But he nevers call me. He did called me sometime telling that i ll be getting my phone on some dates which have already been passed. I was about to get a new phone from their company but now they are saying they cant. Then for what i wasted my time (4 months) for??
Please help me dont know what to do or not. Not a rich guy that i can afford a new phone.