I don't think the 2020 bans were related to the ISP problems...
2020 ban is usually something that can be lifted if you talk to the GMs.
2012 ban is the one that's usually a life sentence.
Contact the GMs by filling out a ticket at support.warpportal.com.
I was banned 2012, then i sent about 3 tickets begging. fortunately they change their minds and released my account in a week! I was so happy