Your ppp0 interface does not have an IP address
Code:
ppp0: flags=108010<POINTOPOINT,MULTICAST,NEEDSGIANT> metric 0 mtu 1500
Your ppp0 interface does not have an IP address and with only having a loopback lo0 interface with 127.0.0.1 there is no way you can connect to any network.
So you would have to review your PPP settings. I am afraid I cannot offer much assistance. Since more then 6 years I have ADSL and haven't touched a real modem since that time.
A way out of your trouble could be to make a backup of your data and configuration files, reinstall and secure your system so you don't get cracked again
