Absolutely none of this is true. You introduced yourself, you rang the intercom and I opened the door and you never showed up in front of my apartment door, I waited for you but you didn't come to the course.
Another thing is that you blocked the payment for the course that you canceled on the same day as the course and requested a refund.
I'm sorry that you didn't show up and therefore unfortunately for this reason alone you were unable to take the course.