Unable to reactivate device, no longer own phone #, and don't have recovery key

I am trying to get back into my iPad after having issues with my appleid and can't remember the passcode. The account is now locked due to too many attempts. I have contacted support advising them that I don't have the Recovery key, no longer own that phone number, and I've read every support page there is on Apple's website. Now I've gone through restore mode and because my own appleid is still on the iPad, I can't even get pass the activation screen because it's still reading that old appleid. Please help!! I have tried everything! And yes, I tried attaching the code to use iTunes doing the restore. My iPad is now stuck at the Activation Lock screen "This iPad is linked to an Apple ID. Enter the Apple Id and password you used to set up this iPad. ci************.