IPAD ACTIVATION LOCKED
So I had an Ipad that my husband gave me (an Ipadpro12.9 inches) i think that was 2017. I changed the apple ID in 2018 because his apple id was still logged on. Then I changed it to a new email for my daughter once again then i decided to delete the apple id that i made for that ipad. SInce I can use mine for my daughter. AFter that I factory reset the ipad so that it would be clean before my daughter use it. Now i couldnt logged on and activate, it says to signed in the apple id that was associated in the ipad. i have been trying the email address i made but couldnt logged on it says email is invalid or it doesnt exist. what to do the ipad is still okay and all. My husband couldnt find a receipt of purchase since ithas been a long time ago when he purchased it. Tried contacting the apple support via chat 2019 but they just cut me off. the ipad was off for almost 2 years. Tried to fix it again, hope you can help me i dont want to throw it because it is still usable for our homeschooling.
Thank you in advance.
iPad Pro 12.9-inch Wi-Fi