New MIUI M1 Problems

Oct 4, 2012
Hi, I just bought a M1 and when its working its amazing! But, the problem is, the wifi connection 80% of the time had error and so I cant connect to the internet. Also, I cant boot up the phone by pressing the power button, I have to take out the battery then put in the charger then wait for the MI to come up then I can switch it on. When I put in the battery, it will continue working but the moment I take the charger cable out, it switched off and I cant turn it on. It shows a blinking orange light after and most of the time. What can i do? It is running 2.9.29