Did they just say "youre banned, goodbye"? Or were they more specific, like "you are banned under Section 4, part 2 of the terms"?
Whilst, as pointed out before, they dont have to sell to you, its always interesting to know if there are any "hidden" clauses in the contracts.
It's rather like the unlimited limited usage fiasco, where it says you have "unlimited usage" in the marketing and general BS, but waaaay down in some small print it says "we will kick you off if you use too much" without saying how much "too much" is.