Good, then there's no reason to rip people off in the meantime. Refund the money now and only charge customers money if and when they deliver actual factual full self-driving.
Tesla backed themselves into this corner. They have lied about the state of full self-driving for years and they have failed to deliver on their own self imposed deadlines.
Teslas don't even do full self-parking, nevermind full self-driving:
That sounds like a big number, but it's less than the revenue of 2 days car production.