Practical advice? Forget it, move on. The system has far more resources and time than you, it costs them nothing to ignore you and by taking no action. Any potential "win" from you can be delayed by them almost indefinitely -- they have salaried legal teams that can deal with any legal action taken by you. It is possible some kind soul may find it in the budget to settle this for $50 and admit no wrongdoing. Would that be satisfying?

Some rather hard experiences have taught us that the system is structured to deal with complaints in a fairly standard way. That is its genius. It's just a laptop, nothing more. You're lucky.