Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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if we discover a pricing or other material error related to a service that has yet to be dispatched or delivered , we will contact you to inform you of this error and give you the option of continuing to purchase at the correct price or cancelling your order . 

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. OPTIONS: ["Unilateral termination", "None", "Contract by using", "Limitation of liability", "Arbitration", "Jurisdiction", "Choice of law", "Content removal", "Unilateral change"].