I bought on the computer but want to install on my Android

I have bought Ccleaner pro + on my computer and I want to install it on my android phone.

I have the licence etc, but no activation code.

I can find no way on the phone to enter the licence. It continually tried to recover from google or buy a new subscription.

So what do I do

If you have a multi device CCleaner licence it can be used to Activate CCleaner Android.
The Activation Code is your multi-device Licence Key.

See this post (2nd half) which has a link to the step-by-step guide: