You could set up a proxy, and it would get you back in.
However with the likely locations of any proxy server your ping would be sky high (> 200). You would also need to pay for the proxy server or for the software to use it.
You would be better off switching ISP.
I live in the UK and had the same problem, but this was people banning me because I was better than them. I used AOL at the time which has a range of IP from 81.xx to 87.xx, and some ip's from 214.xx to 221.xx which meant I was never banned.