Allow people to pay say $50 in order to get someone to actually review all the facts about the case and refund the user the money if they were right.
Honestly, they should be required to simply have a case worker look at everything if the person has exhausted other options. Those other options should be easily found on the company's website (or facebook page, etc). And the case worker should actually have the power to decide either way, free from coercion and without quotas leaning either direction.
This is supposed to be a win win for both the platform and the user and not a source of revenue.
Of course if google decides to try and squeeze a couple of extra bucks of profit from this then it is useless.
Remembering again, perfection is the enemy of good, what we have here is more than good enough for most of the cases perhaps.
In 2041, Google begins offering a service where you can pay $28 ($50 in USD2041) for a human to review your claim. Since it costs them $8 to do this, they will allow you to appeal their decision as many times as you want.
In 2042, a data analyst discovers that routing claims to a specific subset of reviewers maximizes this revenue stream and updates the business logic accordingly.