The tablet won’t charge

So I was using my laptop. Yesturday, I was still able to use it and when I opened it, I was expecting for it to have low battery life but surprisingly it had about 80-90 percent. It was like… 5, 6 or 7 days since I last plugged it. Later on when it told me that my battery life is running 10% I immediately plugged it in the charger and the issue started their. It won’t charge my laptop but I can see that my charger is working and it is being indicated my a blue light. By the way, the “brick”, the one where you plug in the outlet was quite broken and I was able to fix it. It’s not a big issue since it was a long time when that happened and since then I got no problems with it. Going back I didn’t realize at first, thats when it told me that my laptop is running VERY low at 7%. I also plugged it in an extension chord. I don’t know what to do so I went to my room and plug it their and it finally worked but for a like… 20-30 minutes. And right now I can’t fully charge it. I need help, PLEASEEE!!!!!! I use my laptop at school!!!