Replacing blown fuse didn't fix it

I was replacing the blower motor in my 98 Buick Century and when I got done the motor wouldn't turn on - turns out I accidentally unplugged a grey cable in the process and that issue is now resolved. Before I fixed the problem though I checked the fuses. After pulling out one of the two fuses for the blower and checking it I inserted it and when I pressed it back in the fuse panel sparked and several fuses lit up and a couple burned out (interior lights and cigar lighter/data link which had a 30 amp fuse instead of 20 like it should). Anyway I replaced these fuses but interior lights, airflow adjuster for windshield/Mid/Floor and the radio no longer work. The radio still ejects but will not play music. After plugging the grey cable back in next to the blower, the fuses no longer blow when I play with them... What did I break? Fusible link?