Worth separating the two things you are actually worried about, because only one of them is likely.
The first is whether the money is gone. It is almost certainly not. On a card like this the balance is a ledger entry against a deposit that already settled on chain, and the issuer does not have a reason to zero it — when these go quiet the pattern is that the card object stops authorising while the ledger sits untouched. Check the deposit on the explorer and you will know within five minutes whether the credit is real.
The second is whether you can get it spending again, and that is the part with no lever on it. There is no email because there is no account, which is the trade you made at signup and it costs nothing at all until the day it costs everything. At $912 you are nowhere near the ten thousand per transaction ceiling or the hundred thousand monthly one, so limits are not the trigger.
What I would do: one very small charge at a merchant you have never used, then leave it alone for ten days. Retrying every hour tells you nothing and it is the only thing you can do wrong from here.