Cuddles,

Before you try going on the internet, first thing to do is as Champagnemojo said: apt-get remove --purge all alsa related files that you previously downloaded. That should take the defeunct alsa files out of /lib/modules/current kernel folder. If you see another kernel folder besides the one you're using, the alsa modules aren't installed to work with the correct kernel. This is where you're having problems for starters. This means you'll have to apt-get remove --purge all the alsa-base, alsa-utils, alsa-modules stuff you apt-get installed earlier. Then open a terminal shell, and stop alsad or kill it. Then apt-get remove --purge alsad and you should recover your modem drivers and settings, hopefully. Reboot. If that does takes care of your modem, then going forward for sound, you'll only need to apt-get install alsa-base, alsa-utils and alsa-source, nothing else. Unpack the alsa source into /usr/src/modules directory and then cd to alsa. Open a terminal in that folder, then type ./configure, let it do its thing, then type make and let it do its thing. Finally, switch to root and use your password then type make install to install your alsa module(s). Then type modconf to load the sndcore and alsa module. Exit and then type update-modules and then reboot. Hopefully, alsa will kick in and load the appropriate additional modules as needed for sound and you should be good to go from there without any further problems.