The support staff is also unable to change or cancel my order. I am forced to wait unconditionally without any possibility of getting a refund. At this point I just want to cancel my order, what recourse do I have?

This seems to have a lot more to do with a single order shipment than whether or not Google Fi is a scam.

But to say the obvious: no, Google Fi is not a scam. I have ordered many things from google’s store successfully, and I’ve used Google Fi for all my phones for years.