Hi Wolly,

All the products of Reviversoft are easy to use and helps you to keep your PC up to date and secure.
For example,Security Reviver will scan your PC and identify security threats and vulnerabilities. Security Reviver can quickly and safely remove these threats and prevent them from reoccurring.

If you still don't want to use the services, I think you don't need to cancel your subscription as your license will remain active until its expiry date and it will not get auto renewed after that.

But if you are referring to a refund of money for your bought product, you can contact the support team at the below link:

Support

A representative will help you out in a timely manner.

Regards,
Lokesh