Chosen Solution
So my Ipad has been lock for no reason, I am using this for almost 4 years. But one day when im browsing the internet , it suddenly shut down itself then when I power it up. Boom ! Activation Lock! No idea what happen. Not the original owner but, I erase all the owners data. Then change it to my personal data. When I try to enter my email and pw. It says the “this email cannot be use to unlock this ipad” is there any way to fix this?
Apple might be your best bet to regain access while retaining your information: https://support.apple.com/en-us/HT201365 Hopefully you kept proof of purchase for who you purchased it from. Otherwise it’s highly unlikely Apple will help you.