Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you acknowledge and agree that if you have not paid anything to supercell during such time period , your sole remedy ( and supercell 's exclusive liability ) for any dispute with supercell is to stop using the service and to cancel your account . 

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