when you go to bed tonight unplug your modem from the wall. In the morning plug it back in. You will most likely have a new IP.

If you cant wait that long you can also try spoofing the mac address of your router. Since you are still technically assigned your current IP to your mac address, signing on with a different mac address will give your router a new IP. This one should be NOT banned.

Wait a day or two, then remove the spoofing and you will be given another different IP to your proper MAC address.

That worked for me a number of years ago when my IP was banned. They caught on quick and banned my whole account