iPhone 7 Plus locked by Activation Lock, need assurance.
Ok so to begin with, I recently restored my iPhone 7 Plus that I bought a year ago or so, after I restored it, I realized that the 5-7 year old Apple ID password was "incorrect or wrong" after it was fine for the long amount of period up until now. No access to the Apple ID or the original email. (I know, my fault for not updating it as years went on) So the phone got into an Activation Lock, Is this the same as an "iCloud Activation Lock Issue"? Which they can unlock the phone for me if I have proof of purchase?
Either way, I recently called Sprint to see if I could get a copy of proof of purchase, which they said they'll send it to me within 24-48 hours. After I receive it, do I just call support about this specific issue, send them the PoP, and can they unlock the phone for me without having me go to the Apple Store?
Just want to be assured I am not wasting time with this.
Thanks in advance.
iPhone 7 Plus