Cannot validate licenec

I had to reinstall Windows 11 and Ccleaner for which I have an active licence. I cannot activate the licence in the program, and I cannot get a response from CCleaner as the email request link does not work either. There is an error notice in the support section and also in the program. Can anyone advise why I cannot get through to this company?

every time I use cleaner on the MAC it states I have a trial even though I have annual subscription. I enter my license key and everything is fine until next time. I CANNOT get through to this company either. No doubt this is by design.

Email address

support@ccleaner.com

Online webpage support.

https://support.piriform.com/hc/en-us/requests/new?ticket_form_id=86507