Reset Settings on iPhone now locked in activation Lock, my apple Id does not work

Hi,

I reset my old iPhone,

I removed it from my iTunes account (as needed to do during reset)

now I wanted to set up my reset iPhone, however I am locked in the activation lock

as I need to enter the Apple Account that was first used to set up this Iphone

and it would Not take mine. Said it is invalid to unlock this phone

it gives me a weird one, I never heard of

e*****at1*****.com

which is probably a presenting at factory?

What can I do?

Thank you

Caroline