Where’s Hack Club located? This seems to have some elements of extortion. It doesn’t matter if you have a contract, they could still be breaking the law. Some of these billing apes aren’t the smartest people. I went through a similar drama with AWS a few years ago and after months of sleepless nights I decided to open a case with the office of the attorney general in my state. They were pretty quick to follow up m and contacted AWS directly. My case was resolved a few days after that.