Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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we will make the reimbursement without undue delay and not later than 14 days after the day on which we are informed about your decision to cancel this contract . 

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