Or you can email them directly: support@ccleaner.com
Please be aware that support are very busy at the moment and although you will get a ticket number when using the form, and an acknowlegement email, it's taking much longer that usual for a person to reply.
Please also note that as it tells you in the email opening another ticket may put you back down the queue and so further delay the response.
(That's just the way that the queueing system works).
This gives the most common reasons why accounts may show as 'deactivated', but there are others:
I hope support can reactive the license. When I asked about activating a deactivated key I was firmly told it wasn’t possible so I am interested in their answer.
Btw support are currently taking 4 weeks to reply to premium license users - it took them that time to reply to me anyway.