Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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should you desire to do so , please contact your credit card issuer . 

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