Unless it states a duration, then they can just discontinue the contract at the next billing cycle. Is there any indication that they did otherwise? They're no

Unless it states a duration, then they can just discontinue the contract at the next billing cycle. Is there any indication that they did otherwise? They're not saying "You're over the limit; you're in breach of contract." They're saying "You don't make us enough money. You're no longer our customer."