https://my.hostus.us/knowledgebase.php?action=displayarticle&id=68
Can I have a refund?
Refunds are available on our hosting and storage services for up to 3 days.This refund policy excludes refunds for custom packages created and add ons for example cPanel licenses or Additional IP's. Domains and SSL certs are also not included.
强行从白纸黑字来说,官方并没有说明违规不能退款,所以你3天以内还是可以据理力争。
至于如果你非要以什么商家不让用fs或者SSH连不上做借口而去提出争议,那就未免太不成熟了吧~
Update:
算了,我搞错了,在TOS里面有一条,你退不了了
Scripts that cause CPU / Disk IO / Network abuse
Your service may be suspended and no refunds will be provided if you are found to be running anything listed above. This list may not be exhaustive