Dell Technologies - Laptop dead during warranty period

I have purchased Dell Laptop in October **** and now it's * month completed. But as soon as * month completed my Laptop stated giving the truble of no power issue. To resolve this issue Dell replaced motherboard two time since April to mid May ****. Then on ** May **** again same problem happened then I asked for replacement of device. Dell agree on that and but they are not giving me exact date of replacement. Sometime they are saying that this process will take ** days some time ** to ** days and some time they are saying it will take around ** to ** days. Also since this Laptop started giving issue in Apr**** and now it's completed May ****, it means approx *.* months gone and until i receive new laptop it might be * month will be completed. When i asked them to increase laptop warranty by * month they are not ready for that. Also during this period I am in finacial loss due to this.