You have two issues. Without initially resolving the first, having attempted reset of the iPad, you have perhaps complicated the issue.
You must first recover your AppleID credentials - as without these, you’ll not be able to resolve the Activation Lock. If the credentials are known, you can simply update your AppleID account with a new Primary email address.
Change your Apple ID - Apple Support
If the AppleID or associated Password have been forgotten, they can be recovered here:
https://iforgot.apple.com
To recover your credentials, you’ll need access to any one of the following:
- Your primary email address mailbox that corresponds with your AppleID
- Any of the secondary/recovery email addresses that should be configured for your AppleID account
- Any of the trusted telephone numbers (fixed line or Cellular/Mobile) that are associated with your AppleID
Unless you AppleID account has not been fully/correctly configured, or has been seriously neglected, recovery of the AppleID and password should not be difficult.
More information about recovery of your AppleID:
If you forgot your Apple ID - Apple Support
More information about recovery of your AppleID password:
If you forgot your Apple ID password - Apple Support
When you recover access to your credentials, you would be well advised to log-in to your AppleID account from a web browser - and verify/update any email addresses and trusted telephone numbers:
https://appleid.apple.com
When you have recovered the AppleID credentials, you are then able to resolve the Activation Lock on your (previously reset) iPad.
Here are the Apple support pages that outline the Activation Lock - and the only mechanisms by which it can be turned off:
Activation Lock for iPhone, iPad, and iPod touch - Apple Support
Turn off Activation Lock – Apple Support
As you will discover, unless you are the owner of the AppleID that was last used to activate the device, you’ll not be able to defeat or bypass the Activation Lock. If you have documentary evidence that you are the original owner (such as sales receipt showing the serial number), Apple may assist with recovery - otherwise they will not help you and nobody here will be able to help you.