Obviously what I did wasn’t enough, but trust me, I try.
You try? You need to try much harder.
Did you ask him for the full rejection letter? That's the issue I raised below. I'm wondering if he forged the app name.
It seems like the situation still remains a little ambiguous - and forging the name on that letter would be definitive proof.
On the other hand, if you didn't ask for it - why not? It seems like the very least amount of verification you could have done.
Did it simply not occur to you that a source might lie?
If you did not ask for the rejection letter - that would indicate that you didn't even do the most basic checking to determine the facts.
And that would seriously color your statement above "Trust me, I try."
I hope you answer.