I have paid for a two-year subscription, but it only recognises one year

How can I make a complaint?

All customers can now access a ‘Live Chat’ support service.
To start raise a support ticket by using this: https://support.ccleaner.com/s/contact-form?language=en_US&form=general

Once you submit the form you will be given a support ticket/ID number onscreen, with a summary of your request.
Below that is the button to go straight into the ‘Live Chat’ where a virtual assistant will try to help you. If the AI can’t help then you will be passed to a real person.