Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you think that there is a mistake , please make sure that you ask us to confirm any changes in writing , as we only accept responsibility for statements and representations made in writing by an officer of headspace . 

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