If you bought learning materials that are activated in Cambridge One using an activation code then you should receive an email that contains the code. You can then use that code in the child’s account to activate the material. Please see the 'What do I do with the Cambridge One activation code I received for the product I purchased?' help article for details on how to use activation codes.
However, if you bought learning materials that are not activated with a code you’ll need to contact us and we’ll do our best to help. Please use our contact form.