I had a little blowout

With my upstairs neighbor that is.
Last Thursday I left during the day to escape the constant noise. Later that night... or should I say early the next morning, at 12:20 am I tried calling and asking her to be quiet. Her phone went right to voicemail. Grrrr! The noise had been ongoing since 9:30 pm. I got dressed, went upstairs, knocked on the door and said in a stern voice, "It's 12:20 in the morning".
She didn't get it.
Me: You need to be quite now.
Her: I don't know what else I can do.
Me: How about set a decent bedtime so he's not running around at midnight.
Her: He's not running around.
Me: Whatever he or you are doing is too much.
Her: He's 18 months old. He gets up to go to the bathroom.
Me: Something has got to change. This is getting to be a real problem.
Her: What do you want me to do, move?
Me: Hey! Go for it!
Her: Are you going to pay my rent?
Me: It's time to keep it down.

Five minutes later it was quite. I am at a complete loss. In the less than two months she has lived there I've had to go knock on her door four times and call her five times. All calls are 11 pm or later.
Also, what 18 month old little boy is potty trained so well that he wakes himself up in the middle of the night and uses the bathroom????
Liar.