Head unit on, speakers wont play

I hooked up a kicker L7 w/ a kicker 1200/1 yesterday. Ran the remote wire to a fuse under the dash. One which I thought was the radio fuse but it wasnt because amp would have stayed on 24/7. So after I checked the amp to see if it was still on which it was I close the trunk and that did something and the sub make a noise that a sub makes just a constant one. so I pulled out the wire/fuse and now nothing is working except the head unit. Nothing is coming out of the speakers. And the slot where the fuse went, the fuse will not stay in it. It just falls out. Anyone Else have this problem!?!?! I need my stereo!! :(