We would need to know what network you are utilizing to be able to help you with the correct commands.
If another Operator is banning your host (address) I would talk to that operator first and ask the reason. It could be so simple that another user with a similar host as yours is causing problem in the channel is the one being banned.
If the operator has no good reason/response I advise you to talk to the founder of the channel about the situation.
