No, it doesn’t violate your rights. All software, including games, comes with EULA (End-User License Agreement) and/or TOS (Terms of Service). You accepted those when you purchased the game and started playing it. If you violate any of the terms in those, you lose your right to use the software.
On top of that, you’re not actually paying for the official servers. What you paid for is the game and its DLCs, which come with the ability to connect to a server, not with a right to connect to specific servers. The official servers are provided by Funcom free of charge and they have the legal right to deny you access to them.
In short, it’s like complaining that you bought a web browser from a company and then that company denied you access to their own website, but not others.
Like everyone else said, if you didn’t break any of the official server rules, you can appeal the ban. If you did break the rules, well… learn not to do that in the future.