To contact Facebook regarding your mobile transaction, please go to the Facebook Support Center here. You'll find the contact link under Get Help at the bottom of the page.
You may need to provide transaction information for Facebook to assist you. You can find this by logging into the Boku Customer Care Portal.
The information that Facebook will need is in the ‘Session Param’ column that you can find either in your Facebook purchase history results or in the Customer Care Portal linked above. Ensure you provide them with the Session Param for the transaction in question, which will enable Facebook to provide you with the most appropriate assistance.
Additional questions regarding the Boku Customer Care Portal? Visit our common FAQs here.