Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
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 . 

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