I’d like to cancel everything to do with ccleaner. Damned program crashed my Window system. Had to do a full restore. Lost everything.
Well you don’t say just what it was that you used/did that ‘crashed your system’ so we can’t comment further on that.
However if you want to complain and/or cancel your CCleaner subscription:
You can raise a support ticket by using the form here: CCleaner Support Community
You can also contact CCleaner support by emailing: support@ccleaner.com
You should be aware that support are taking a very long time to reply at the moment.