phantom power supply

Hey guys, Just bought the Neweer 700 kit, with the phantom power supply. However, I have been faced with 2 major problems; A loud interference (even after i fully lower the boost) keeps entering the sound and Discord is using the default mic but it sounds much worse in terms of quality. The...

So here's the thing my sister just got me a bm 700 microphone with xlr cable, stand, pop filter. all in one set online. However, whenever I plug it in my pc it doesn't work it doesn't amplify my voice. I can only hear my voice when I check the properties and check the "listen to this device" box...