So basically, I removed a part from my caliper, the one with a spring in it, that is supposed to push the pad onto the rotor. I removed the cover and the spring popped out. I don't know why I did that, but I somehow managed to put it back. After that the brake is not like it used to be, the lever wont spring back fully, I can press the lever all the way till it hits the grip, but with the front lever that is not the case. I also opened a lever because I wanted to remove the cable so I can easily access to caliper, I put it back but everything seems very wrong.
The caliper is a Repute, don't know the exact model.
I'm a 15 y/o kid who knows only some basic things about bikes, so go easy on me :)