I forget my Apple ID password or security question

To remove the activation lock you will need to have the Apple ID/Password of the rightful owner of the iPad, or alternatively be able to answer the related security questions acceptably, unless there are extenuating circumstances, e.g., you have a purchase receipt with the pad’s serial number on it or you inherited it through the death of someone and you have death-related proof of ownership. Under these alternatives, Apple, at its discretion may remove the activation lock. Given the receipt you posted. I suggest you contact Apple support using these options.

Get a call from Apple support to help solve your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

Apple ID Support https://support.apple.com/apple-id

Apple ID account security for country-specific and

region-specific help https://support.apple.com/en-us/HT204169

Get Support: We’re here to help  https://getsupport.apple.com/. Go

through the options to find the best support option.

See if you can recover the password and security questions.

If you are being told there isn't enough information to reset them, contact Apple ID Support.

If you don't know the answers, if the steps in the article below don’t work, contact Apple ID Support, although I’m not sure they will be able to help. 

Apple ID - If you forgot the answers to your Apple ID security questions.      

From the article below. 

Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.

Security and your Apple ID.    

Apple ID - Official Apple Support.    

Contact Apple for help with Apple ID account security - Apple Support.   (Link doesn't always load)  

Get Support    Work through the screens to get a chat option. 

https://twitter.com/AppleSupport

Or fill out and submit  iTunes Store - Contact Us - Official Apple Support    The form is for iTunes, but will get passed to the ID Support section. 

Enter the Apple (iCloud) ID and click Forgot Password.

Apple ID - Manage            

Apple ID – Forgot Password