You don't need "objective AI." In this case, you just need a process that goes to a human when it is contested. Sure, make the user pay a certain amount of money to get an investigation by a third party or to have all the information provided to a court. But if Google made a mistake, and that mistake caused tort, Google is going to have to pay out.
The appropriate thing to happen here is something along these lines:
Google's AI tells the person their account is cancelled, but they can contest it for $100. The person contests it, and a human is put on the case and investigates. That person determines that Google made a mistake, and Google will restore the account quickly, and pay the person $200 for the hassle.