I sincerely doubt it was a permanent ban. If it was, then he's way out of line, but I doubt it was. In any case, for a first time offense the ban shouldn't have been more than an hour, and that only after fair warning (fair warning to include time to move out of the supposedly illegal spot).
That is assuming you actually were banned immediately and didn't sit there for an entire round claiming it was '2 seconds' (yes, this has happened before).